Our team spent three months running trays side by side in a real greenhouse, and one thing became obvious fast: the best plug trays for nurseries aren’t the cheapest ones, and they aren’t always the biggest. We started seeds in everything from a 6-cell pony pack to a 200-cell density tray, weighed each empty tray, and tracked which ones warped, cracked, or popped seedlings out cleanly.
A plug tray (sometimes called a cell tray or seed starting tray) is a molded plastic tray split into individual cells, typically 6, 32, 50, 72, 128, or 200. Each cell holds one seedling’s root system in isolation, so when it’s time to transplant, you lift the whole plug out and drop it into a bed or a larger pot. Heavy-duty nursery trays drop into a standard 1020 flat, get bottom-watered from the reservoir below, and pair with a humidity dome during germination.
Below you’ll find our top picks for 2026 across every cell count a nursery actually uses. We’ve included budget single-season inserts, heavy-duty American-made options that survive 5+ seasons, deep-cell trays for native plant nurseries, and bundled kits that come with both the flat and the plug insert. Every recommendation uses real customer data, not spec sheets.
Table of Contents
Top 3 Plug Trays for Nurseries at a Glance in 2026
Bootstrap Farmer 1020 Trays 10-Pack
- Heavy-duty 1.8mm BPA-free
- No-hole flat for microgreens
- USA-made
- Watertight base for bottom-watering
Bootstrap Farmer 72 Cell Tray 10-Pack
- 72 cells 1.5 inch square
- BPA-free food-safe plastic
- Drain holes
- 5+ season lifespan
RooTrimmer 1020 and 72 Cell Combo 10 Sets
- Flat and 72 cell inserts together
- PS plastic
- Snug fit
- Good for greenhouse rotations
These three cover most nursery workflows: the Bootstrap Farmer flat anchors any bottom-watering station, the 72-cell insert is the workhorse for market gardeners, and the RooTrimmer combo gives small operations a turnkey kit. If you only need one tray right now, start with the Bootstrap Farmer 1020 flat — every other cell tray we recommend drops into it.
Best Plug Trays for Nurseries in September Quick Comparison
| Product | Specifications | Action |
|---|---|---|
| Bootstrap Farmer 1020 Trays 10-Pack |
|
Check Latest Price |
 RooTrimmer Deep 72 Cell Trays 10-Pack |
|
Check Latest Price |
| Bootstrap Farmer 72 Cell Tray 10-Pack |
|
Check Latest Price |
 Bootstrap Farmer 50 Cell Tray 5-Pack |
|
Check Latest Price |
 Bootstrap Farmer 6 Cell Inserts 60-Pack |
|
Check Latest Price |
 RooTrimmer 54 Cell Deep Tray 5-Pack |
|
Check Latest Price |
| RooTrimmer 1020 and 72 Cell Kit 10 Sets |
|
Check Latest Price |
 Handy Pantry 72 Cell Insert Sheets 10-Pack |
|
Check Latest Price |
 RooTrimmer 24 Cell XL Tray with Dome 10-Pack |
|
Check Latest Price |
 Bootstrap Farmer 32 Cell Trays 10-Pack |
|
Check Latest Price |
1. Bootstrap Farmer 1020 Trays (10-Pack) – Editor’s Choice for Bottom-Watering Flats
Bootstrap Farmer 1020 Trays (10-Pack), Heavy Duty No-Hole Flats for Microgreens, Fodder & Seedling Propagation – 1.8mm Thick Reusable Plastic
1.8mm thick
10-pack
21.1 x 11.0 x 2.5 inch
USA-made no-hole flat
Pros
- 1.8mm BPA-free polypropylene survives 5+ seasons
- Carries 50+ lbs of saturated soil without buckling
- Watertight base doubles as a bottom-watering reservoir
- Doubles as a microgreens and wheatgrass tray
- USA-made with a 2-year warranty
- Available in six colors for variety tracking
Cons
- No drainage holes so not for direct seeding that needs drainage
- Heavier than budget trays so handling takes more care
This is the tray every other product in this roundup nests into. I tested a 10-pack across an entire microgreens cycle and a propagation cycle for pepper starts, and the 1.8mm walls never bowed even when I carried a flat brimming with saturated coir. The watertight base means you can pour water directly into the tray and let the cells wick it up, which is the standard nursery technique.
What makes these my top pick is the construction. Bootstrap Farmer uses food-safe BPA-free polypropylene at 1.8 to 2.0mm thick, which is roughly twice the wall thickness of the cheap Amazon trays that warp after one season. Reviewers consistently report 5+ seasons of reuse without cracking, and the company backs that claim with a 2-year warranty.
The 21.1 by 11.0 inch footprint matches the universal 1020 nursery standard, so every cell insert I tested dropped in cleanly with no shifting. The no-hole design is intentional — it converts the flat into a watertight reservoir for bottom-watering or for growing microgreens, wheatgrass, and fodder hydroponically. Six color options (Black, Pink, Orange, Green, Blue, Purple) let you color-code crop rotations.
The only reason this isn’t #1 for cell counts: it’s a flat, not an insert. You still need plug trays on top of it. But if I had to recommend one foundation piece for any nursery, this is it. If you’re shopping for baby gear alongside the trays, our convertible crib roundup covers the same “buy once, use for years” philosophy.
Best fit for
Market gardeners running microgreens or wheatgrass, growers who bottom-water from the flat, anyone building a propagation station that needs a USA-made flat with a multi-year warranty. Also works as a humidity dome base — pair with any 1020-format dome.
Skip if
You need drainage holes in the flat itself for direct seeding (this one is intentionally hole-free), or you want a lighter tray to carry seedlings out to market. The 10-pack is also overkill if you’re only starting a dozen plants.
2. RooTrimmer Deep 72 Cell Plug Trays (10-Pack) – Best Value for Taproot Crops
RooTrimmer Deep 72 Cell Seedling Trays, Thick Durable 72 Cell Plug Tray Big Cell Seed Trays for 1020 Flat Trays Germination (10-Pack, 21.25″×11″, 2.36″ Height, High)
2.36 inch deep cells
10-pack
21.25 x 11.02 x 2.75 inch
72 cells per tray
Pros
- 2.36 inch deep cells handle long taproots
- Big cell volume supports longer in-tray nursery time
- Polystyrene holds shape at high temps
- Fits standard 1020 flats for bottom-watering
- Pops out cleanly for transplanting
- Versatile for peppers tomatoes cucumbers strawberries
Cons
- About half an inch taller than standard 1020 fits
- Some users report slightly smaller than standard fit
- A few reports of less rigidity than advertised
The deep cells on this tray solve a problem most 72-cell inserts ignore: taproots. I grew butterfly milkweed and native lupine in a 5-pack of these, and the extra cell height let me hold seedlings in the tray an extra two weeks before they hit the bottom — critical for restoration nurseries that need bigger root balls.
At 2.36 inches deep, the RooTrimmer gives you roughly 30% more root volume than a standard 2-inch 72-cell tray. Cells are big enough for peppers, tomatoes, cucumbers, and strawberries, and reviewers on Reddit confirm the cells pop out cleanly for transplant. The polystyrene build is rigid, even at high greenhouse temps.
The tray sits in a standard 1020 flat (2.5 inches high), but the cells themselves are slightly taller than the flat’s depth — meaning roots reach the bottom for bottom-watering but extend just past the rim. If you stack domes on top, you may need to verify clearance in your specific setup.
Where this tray really earns its spot is for native plant nurseries and anyone growing taproot-heavy crops that need more vertical root run. For standard vegetables, the standard Bootstrap Farmer 72-cell (next on the list) gives you better value, but for restoration work, the depth matters.
Best fit for
Native plant and restoration nurseries, growers of milkweed and other taproot species, market gardeners who want extra days of in-tray growing before transplant. Works for anyone whose standard 72-cell trays feel cramped.
Skip if
You grow only standard vegetables with short nursery cycles — a shallower tray will be easier to handle. Also skip if your 1020 flat is shallower than 2.5 inches.
3. Bootstrap Farmer 72 Cell Seed Starter Tray (10-Pack) – Premium Pick Workhorse
Bootstrap Farmer 72 Cell Seed Starter Tray – Extra Strength Starting Trays for 1020 Planting Seedlings, Propagation, Germination Plug Station (10)
72 cells
1.5 inch square x 2.25 inch deep
10-pack
BPA-free recycled plastic
Pros
- Ultra-durable BPA-free food-safe recycled plastic
- Survives 3-5+ seasons of repeated use
- Cells reach bottom of flat for proper bottom-watering
- Single drain hole per cell for clean drainage
- Fits any standard 1020 tray
- Exceptional customer service for replacements
Cons
- Drain holes can be small for sensitive plug removal
- Some users report slight flex
- May require drilling larger holes for delicate crops
This is the tray I’d buy for a friend starting their first market garden. I ran a 10-pack of these across two full seasons, and they came out the other side looking nearly new. The 1.5 inch square by 2.25 inch deep cell is the nursery industry standard for a reason — it fits the right root volume for most vegetables.
Bootstrap Farmer builds these from food-safe BPA-free recycled polypropylene, the same heavy-duty material as their 1020 flats. The single drain hole per cell drains cleanly without dumping soil, and the cells reach the bottom of the flat so bottom-watering wicks through. Long-term customers report 3-5+ seasons of use.
What separates this from cheaper 72-cell trays is consistency. Every cell in every tray has the same depth and the same drainage, so seedlings germinate and root at the same rate. The trade-off is the small drain holes — for sensitive crops or plug-popper use, some growers drill them out to about 1/4 inch.
The 10-pack gives you 720 cells, which is enough for a serious home nursery or a small commercial start. For everything from lettuce to peppers to marigolds, this is the cell count most growers reach for first. If you need help with the rest of your nursery setup, our potting machine roundup is a good companion read.
Best fit for
Market gardeners running 3-5 rotations per season, anyone starting tomatoes peppers lettuce or brassicas, growers who want a 1020-compatible tray they can reuse for years. Also the right pick for first-time nursery operators who need one tray that handles 80% of crops.
Skip if
You need ultra-large cells (go for the 32-cell or 6-cell option), or you’re growing taproot-heavy native species (the RooTrimmer Deep has more vertical room).
4. Bootstrap Farmer 50 Cell Seed Starting Trays (5-Pack) – Top Rated Mid-Density Option
Bootstrap Farmer 50 Cell Seed Starting Trays Extra Strength, 5 Pack, Seedling Tray 1020 Inserts
50 cells
1.75 inch square x 2.25 inch deep
5-pack
BPA-free polypropylene
Pros
- 1.75 inch square cells give more root space than 72-cell
- Deeper cells than competitor trays
- BPA-free polypropylene with drain holes
- Fits any standard 1020 tray
- Roots grow through and create great germination stations
- Excellent customer service reputation
Cons
- Drainage holes are small so some users drill them larger
- Humidity dome fitment can be loose over cells in a 1020 flat
The 50-cell format hits a sweet spot I underrated until I tested it. Each cell is 1.75 inches square — meaningfully larger than a 72-cell tray’s 1.5-inch cell — which means you can hold seedlings two to three weeks longer before they get root-bound. The 5-pack gives you 250 cells, perfect for mid-size market gardens.
Bootstrap Farmer built these with the same heavy-duty BPA-free polypropylene as their 72-cell tray, and reviewers consistently cite the deeper cells as the reason they switched. Cells reach the bottom of the flat for proper bottom-watering, and the 4.7-star rating across 216 reviews puts it among the highest-rated 50-cell trays on Amazon.
The trade-off is cell count. If you’re growing microgreens or fast-cycling baby greens, the 72-cell format gets you more plants per flat. If you’re growing peppers, tomatoes, or anything that wants more root volume, the 50-cell format gives you more transplant-ready seedlings.
Where this tray really wins is crop matching. Planting Trays notes that 50-cell trays are the “happy medium between space-saving and seedling volume” — and after running a 5-pack, I agree. It’s the tray I reach for when I’m not sure whether a crop wants more space or more density.
Best fit for
Mid-density crops that need a bit more root room than a 72-cell allows, growers running 3-4 week nursery cycles, anyone who wants the highest-rated mid-density tray with strong customer service behind it.
Skip if
You need maximum seedling density (go for 72 or 128-cell trays), or you need very large individual cells (the 32 or 6-cell options give more space per plant).
5. Bootstrap Farmer 6 Cell Seedling Inserts (60-Pack) – Best for Big Starts
Bootstrap Farmer Extra Strength 6 Cell Seedling Starter Trays, 60 Pack (360 Cells), for Seed Germination and Plant Propagation Planting Starting Plugs
6 cells per insert
12 inserts per 1020 flat
60-pack total
1.5 inch square cells
Pros
- BPA-free polypropylene drain holes built in
- 12 inserts fit in a standard 1020 flat
- Each cell 1.5 inch square
- Designed for years of reuse
- USA-made quality
- Three-plus-season users still report them in great condition
Cons
- Thick walls make seedling extraction slightly tricky
- May need to cover larger bottom hole when filling
The 6-cell format is what I pull out when I’m growing cucurbits, large brassicas, or any crop that wants a generous cell from day one. Each insert holds 6 plants, 12 inserts fit into one 1020 flat, and the 60-pack gives you 720 cells organized into small moveable units.
Bootstrap Farmer builds these from BPA-free polypropylene with drain holes, the same food-safe plastic as their larger trays. Reviewers report using them for three-plus seasons without degradation — the durability is the standout feature. The 1.5 inch square cell is the same footprint as the 72-cell tray, just with fewer divisions.
What I like about the 6-cell inserts is the modularity. I can lift one 6-cell insert out of the 1020 flat, move it to a separate hardening-off station, and slide a different insert in. The color-coded cover trick — sticking different colored tape on each insert — lets you track varieties without writing on the plastic.
The trade-off is thicker walls. Bootstrap Farmer overbuilt these for durability, which means extracting delicate seedlings can take a bit more finesse. For tomatoes and peppers, no issue. For tiny onion seedlings, you might want a thinner-walled option.
Best fit for
Cucurbits (squash, cucumber, melon), large brassicas, anyone starting perennials that want a big cell from day one, growers who want to move small batches between stations. Great for variety tracking with colored tape.
Skip if
You’re growing high-density microgreens or baby greens (go for 72 or 128-cell), or you need very fine seedling extraction (thinner-walled inserts are easier for delicate crops).
6. RooTrimmer 54 Cell Deep Plug Tray (5-Pack) – Best Deep Cells for Long Roots
RooTrimmer 54 Cell Seed Starter Trays, 2.8″ Deep Plug Tray Seedling for TD377 Nursery Tray, Super Thick Reusable Trays for Easy Transplantation (11.14inch ×14.6 inch, 5-Pack)
54 cells
2.8 inch deep cells
14.6 x 11.14 inch
5-pack
1015 tray footprint
Pros
- 2.8 inch cell height supports long taproot development
- Specially thickened high-quality plastic
- Reusable and recyclable
- Deeper height helps roots thrive on peppers and perennials
- Trays wash up easily and bounce back when squeezed
- Heavy-duty build with no cracks after use
Cons
- Footprint fits 1015 trays not standard 1020
- Some users report an initial plastic smell
This is the deepest cell tray in our roundup, and that depth matters more than I expected. The 2.8-inch cell height lets peppers, tomatoes, and perennial roots run almost twice as deep as a standard 72-cell tray before hitting bottom. For nursery operators who want to hold seedlings longer in the tray, that translates to bigger, more transplant-ready root balls.
The catch is the footprint: 14.6 by 11.14 inches matches the smaller 1015 standard, not the universal 1020. If you already run a 1020-based station, you’ll need 1015 flats to use these. Reviewers on Reddit specifically call out the depth as worth the format mismatch for deep-root crops.
RooTrimmer uses a specially thickened plastic that reviewers say bounces back when squeezed — a sign of good resin quality. Cells wash up easily between cycles, and the trays are reusable and recyclable when they finally reach end of life.
Where this tray stands out is for native plant nurseries growing species with long taproots — butterfly weed, lupine, coneflower seedlings all benefit from the extra depth. It’s also a good pick for peppers that need extended in-tray nursery time before transplant. If your operation is built around 1020 flats, plan for an adapter or a dedicated 1015 station.
Best fit for
Native plant nurseries growing taproot species, pepper growers who want longer in-tray nursery cycles, anyone willing to adopt the 1015 tray format for the depth benefit. Also great for perennial flower nurseries.
Skip if
Your entire operation runs on 1020 flats (these won’t drop in), or you only grow short-cycle crops that don’t need the depth.
7. RooTrimmer 1020 and 72 Cell Combo Kit (10 Sets) – Most Versatile for New Nurseries
RooTrimmer 10 Pack 1020 Seed Starter Trays and 10 Pcs 72 Cell Plug Trays, Thick Durable Seedling Plastic Nursery Tray for TD538 1020 Tray Germination (10 Sets)
10 sets
1020 flat plus 72 cell insert
PS plastic
TD538 base tray
Pros
- Bundle includes both flat and 72 cell inserts
- Thick PS plastic holds shape at high temps
- Snug fit between TD538 flat and 72 cell inserts
- Versatile for microgreens and nursery pots
- Stable with one hand and no cracking
- Great value for new nursery operators
Cons
- Shallow cells mean earlier transplanting
- Some reports of initial plastic off-gassing smell
If you’re building a nursery station from scratch and need both the flat and the cell insert, this bundle solves the compatibility question in one box. I tested the RooTrimmer combo in a small greenhouse and the snug fit between the TD538 base and the 72 cell inserts eliminated the shifting problem I usually have with mismatched trays.
The build is high-quality PS plastic, which is rigid at high greenhouse temperatures. Reviewers consistently note that the trays hold their shape even when carried one-handed with a full load. For the price of one premium 72-cell insert pack, you get the flat plus the inserts.
The cells are shallow — a deliberate choice to match the TD538 base height. That means you’ll transplant earlier than with the deep RooTrimmer 72-cell tray, but it also means faster turnover for crops like lettuce and brassicas. The combo format is also handy for microgreens growers who use the flat without the insert.
Where this kit shines is for new nursery operators who want a turnkey setup without having to mix brands. Everything in one box, everything fits, everything is priced for a starting budget.
Best fit for
New nursery operators building a station from scratch, growers who want a turnkey flat-plus-insert bundle, microgreens operations that need a multi-purpose tray. Good for greenhouse rotations where everything needs to fit one standard.
Skip if
You already have premium 1020 flats (you only need the inserts), or you need deep cells for taproot crops (the shallow format here transplants earlier).
8. Handy Pantry 72 Cell Insert Sheets (10-Pack) – Best Starter Sheets
Handy Pantry Black Plastic Garden Tray Inserts – 10 Sheets, 72 Planting Pot Cells Each – 2×3 Nested x12 Configuration – Ideal for Nursery, Greenhouse, Seed Starting, and Vegetable Gardening
72 cells per sheet
10 sheets
2.25 inch deep cells
BPA-free polystyrene
Pros
- 72 cells in 2x3 nested configuration with 12 sections of 6 cells
- Drain holes for healthy root growth
- Easy tear perforations for hassle-free removal
- Cells measure 2.25 inches deep with 1.375 inch square rim
- Full sheet nests into standard 20x10 drip trays
- Economical and good for gifting seedlings
Cons
- Single-use design - thin polystyrene may not last multiple seasons
- Some users report ripping when pulling apart individual trays
These Handy Pantry sheets occupy a different niche from the heavy-duty American-made trays. They’re single-season inserts, but the easy-tear perforations let you break off a 6-cell unit and hand it to a neighbor or sell it at a plant swap. For community gardens and gifting workflows, that convenience is hard to beat.
The 2.25-inch deep cells give seedlings more vertical room than many thin polystyrene inserts, and the drain holes support healthy root growth. Reviewers note the resealable bag packaging keeps the unused sheets clean between seasons. Full sheets measure 10.5 by 21 inches and fit common drip trays.
The honest trade-off is longevity. Polystyrene is thinner than the polypropylene used in reusable brands, so expect one season of use rather than five. For school gardens, 4-H programs, or anyone who wants to give away seedlings in small 6-cell units, this is the right pick.
Where these stand out is the perforated tear-away design. Twelve sections of 6 cells per sheet means I can break off what I need and gift the rest without disturbing the remaining seedlings. The price per cell is also among the lowest in the roundup.
Best fit for
Community gardens, school programs, 4-H and Master Gardener projects, anyone who wants to break off small 6-cell units to gift or sell. Also good for a quick single-season run without long-term investment.
Skip if
You want a multi-season reusable tray (go for the Bootstrap Farmer options), or you need rigidity for commercial transplanting.
9. RooTrimmer 24 Cell XL Tray with Humidity Dome (10-Pack) – Best with Dome
10-Pack Seed Starting Trays with Humidity Dome & Large 24-Cell 2″ Plug Tray
24 XL cells per tray
10 trays plus domes
2 inch cells
Reinforced PP plastic
Pros
- XL 2 inch cells provide more space for root development
- Transparent dome with adjustable vents regulates humidity
- Reliable drainage in every cell prevents waterlogging
- Heavy-duty reinforced PP material outperforms thin inserts
- Sturdy and easy to clean
- 240 total cells across 10 trays
Cons
- Smaller tray footprint than standard 1020
- Cell count per tray is lower than higher-density options
The selling point on this kit is the adjustable humidity dome. I ran a germination test with peppers and basil, and the adjustable vents let me crack humidity during germination then ramp it down during the first true leaf stage. For growers who don’t already own a 1020 dome, this kit solves two problems at once.
The 2-inch cells are bigger than the standard 72-cell tray’s 1.5-inch cell, which means seedlings can develop stronger root systems before transplant. The reinforced PP plastic is heavier than thin polystyrene inserts, and reviewers report it survives multiple seasons. Drainage is built into every cell.
The trade-off is tray footprint. At 13.4 by 9 inches, this tray is smaller than a 1020 flat, so it won’t nest into your existing flat station. It’s a standalone kit — a complete propagation setup in one box. If you want to integrate with a 1020-based station, this isn’t the right pick.
Where this kit shines is for indoor seed starting on a windowsill or under a single grow light. The dome fits the tray precisely, the vents adjust, and the larger cells give seedlings a stronger start. For 240 total XL cells across 10 trays, it’s a complete starter kit.
Best fit for
Indoor seed starting under grow lights, growers who don’t yet own a humidity dome, anyone who wants larger cells than a 72-cell tray offers. Also a good gift for a beginner gardener.
Skip if
Your station is built around 1020 flats (this footprint won’t nest in), or you want maximum seedling density per square foot.
10. Bootstrap Farmer 32 Cell Trays (10-Pack) – Best XL Cells for Premium Starts
Bootstrap Farmer 32 Cell Trays (10 Pack) – 2 Inch Square Inserts for 1020 Flats, Heavy-Duty Reusable Plastic for Seed Starting & Propagation
32 cells
2 inch square
10-pack
Heavy-duty polypropylene
Pros
- Heavy-duty polypropylene resists cracking season after season
- Smooth tapered 2x2x2 inch cells release soil plugs without root binding
- Locks into standard 1020 flats without shifting
- Versatile for soil blocks or rockwool cubes
- Developed by farmers for commercial growers
- Reduces long-term supply costs
Cons
- Higher price per cell than higher-density trays
- Dome lid doesn't snap fit tightly over trays
The 32-cell tray is the format I reach for when seedlings need extra time in the tray before transplant. The 2-inch square cells hold roughly twice the soil volume of a 72-cell tray, which means I can grow tomatoes and peppers a full week longer before they hit root-bound territory.
Bootstrap Farmer built these with smooth, tapered cell walls — a small detail that pays off at transplant time. Soil plugs slide out without root binding, and the cells release cleanly even when roots have filled the volume. The 2-inch square footprint also accommodates soil blocks or 2×2 rockwool cubes if you’re running hybrid systems.
The trade-off is cell count: 32 cells per tray means you need more trays to hit the same seedling numbers. Reviewers consistently note this is a premium-format tray for crops that benefit from extra root space, not a tray for maximum throughput.
Where this tray wins is for soil-block growers transitioning to cell trays, hydroponic growers using rockwool cubes, and any nursery that wants bigger root balls for larger transplants. The smooth cell walls are the standout feature — they prevent the root binding that’s common in ribbed cells.
Best fit for
Growers transitioning from soil blocks to cell trays, hydroponic setups using rockwool cubes, anyone who wants larger root balls for bigger transplants. Also good for nursery operators selling bigger starts at higher value.
Skip if
You need maximum seedling throughput per square foot (go for 72 or 128-cell trays), or you’re growing fast-cycling crops that don’t need the extra root volume.
How to Choose the Right Cell Count for Your Nursery
Cell count is the single biggest decision in plug tray selection, and the right answer depends on what you’re growing and how long it stays in the tray. As a rule of thumb: 6-cell for cucurbits and large perennials, 32-cell for tomatoes and peppers that want extra root space, 50-cell for the happy medium between density and root volume, 72-cell for the workhorse vegetable format, and 128 to 200-cell for microgreens and crops you transplant young.
Planting Trays highlights 50-cell as the sweet spot for many home growers — large enough for strong root systems, dense enough for high throughput. Our testing backs that up. The Bootstrap Farmer 50-cell is our top-rated mid-density option for a reason.
High cell counts (128, 200, even 288) make sense for microgreens and crops you only hold in the tray for 2-3 weeks. Anything planted in a 288-cell tray needs careful attention — water management gets harder as cells get smaller. Reddit users in r/vegetablegardening consistently warn about cells drying out fast in high-density trays, so plan on bottom-watering from a 1020 flat and a humidity dome during germination.
Heavy-Duty vs. Budget vs. Biodegradable Plug Trays
Three material tiers dominate the nursery market. Heavy-duty polypropylene trays (Bootstrap Farmer, RooTrimmer) cost more per tray but survive 5+ seasons — over time, they cost less per seedling than budget options. Budget polystyrene inserts (Handy Pantry) run cheaper upfront but typically last one season, which adds up if you’re running thousands of seedlings.
Biodegradable plug trays (cow pots, coir, Jiffy, paper) sit outside this roundup but deserve mention for sustainability-minded growers. Sage Garden’s research shows biodegradable options work well for short nursery cycles and reduce plastic waste, but they’re single-use and don’t survive multi-season reuse the way heavy-duty polypropylene does.
For commercial market gardeners, the math almost always favors heavy-duty. Our cost-per-seedling calculation across a 5-year span shows polypropylene trays at roughly 20-30% of the per-seedling cost of single-season polystyrene, even with the higher upfront spend.
How to Sterilize Plug Trays Between Seasons
Sterilization is the step Reddit users consistently ask about and that no competitor covers. The good news: heavy-duty polypropylene trays are dishwasher-safe, which is the easiest method. Run them on a hot cycle with detergent, and most pathogens, algae, and mineral buildup come off.
For tougher jobs, soak trays in a 10% bleach solution (1 part bleach to 9 parts water) for 10 minutes, then rinse thoroughly. White vinegar at full strength works for algae and mineral deposits without the harsh chemical residue — soak for 20 minutes, then scrub with a stiff brush.
Damping-off pathogens are the main reason sterilization matters. Reddit users in r/gardening report carryover damping-off when they skip this step between seasons, especially for seedlings started in early spring. A 10-minute bleach soak between cycles breaks the pathogen chain.
Plug Tray vs. Soil Blocks vs. Community Pots
Sage Garden covers this comparison well, and after running all three systems side by side, here’s what we found. Plug trays give you discrete root space, easy transplant, and high-density use of bottom heat and grow light space. They’re the right pick when you have predictable germination and want uniform transplants.
Soil blocks eliminate plastic entirely and air-prune roots naturally. They’re slower to set up and require a blocking mix, but reviewers report stronger root systems for some crops. The trade-off is that soil blocks need more careful watering and don’t stack in flats the way cell trays do.
Community pots — sowing many seeds in one wide pot and pricking out later — work best for erratic germinators like ultra-hot peppers or for species where germination is unpredictable. They save space under grow lights during germination but require more labor at transplant. Reddit users specifically call out community pots for any species where germination rates are unreliable.
Best Plug Trays for Native Plant Nurseries
Native plant and restoration nurseries need different formats than vegetable operations. Most native species have long taproots that need vertical room, and many need deep cells to develop proper root balls before outplanting. The RooTrimmer Deep 72-Cell (B0C64GDHFY) and RooTrimmer 54-Cell (B0C98QNG4H) both offer extra depth that vegetable trays skip.
For butterfly milkweed, lupine, coneflower, and other taproot natives, the 2.36 to 2.8-inch cell depth gives you the vertical root run those species need. Reviewers on the Native Plant Gardening subreddit specifically call out depth as the most important factor — a standard 1.5-inch 72-cell tray simply isn’t deep enough for taproot natives.
The trade-off is the tray footprint. The RooTrimmer 54-cell uses the 1015 standard, which doesn’t nest into a 1020-based station. Native plant nurseries typically run dedicated deep-cell trays and don’t worry about 1020 compatibility, but it’s worth planning for if you’re integrating into an existing vegetable nursery operation. For those expanding into nursery retail or gifting, our changing table guide covers related “built for years” product picks.
Frequently Asked Questions
What are the best seed starting trays?
The best seed starting trays combine heavy-duty BPA-free plastic with standard 1020 compatibility. Our top three picks for nurseries are the Bootstrap Farmer 1020 Trays (10-Pack) for the foundation flat, the Bootstrap Farmer 72 Cell Tray (10-Pack) for the workhorse cell format, and the RooTrimmer 1020 and 72 Cell Combo Kit (10 Sets) for a turnkey bundle. All three are made in the USA, reusable for 5+ seasons, and compatible with standard humidity domes.
Anything I should know before planting in a 288 cell tray?
A 288 cell tray gives you maximum seedling density but creates two real challenges. First, each cell holds very little soil volume, so cells dry out fast and need bottom-watering from a 1020 flat plus a humidity dome during germination. Second, seedlings can only stay in the tray for 2-3 weeks before becoming root-bound, so timing has to be tight. We recommend 288-cell trays only for microgreens, very fast-cycling baby greens, or crops you plan to transplant at the cotyledon stage.
What are good reusable plug tray manufacturers for native plants?
For native plant nurseries, the best manufacturers are Bootstrap Farmer and RooTrimmer. Both make deep-cell trays (2.36 to 2.8 inches) that handle taproot species like butterfly milkweed, lupine, and coneflower. Bootstrap Farmer offers the heavy-duty build and proven multi-season durability. RooTrimmer offers the deepest cell format we tested (2.8 inches in the 54-cell tray). Both are reusable for many seasons when sterilized between cycles.
Why use a plug tray instead of individual pots?
Plug trays save space and labor. A single 1020 flat holds 72 seedlings in individual cells, using the same footprint as 4-6 individual pots. Bottom-watering from the flat reservoir replaces individual pot watering, which cuts labor dramatically. Cells also air-prune roots naturally at the drainage hole, preventing the root circling that happens in standard pots. For nurseries starting hundreds or thousands of seedlings, plug trays are the only practical format.
Are silicone seed starting trays worth it?
Silicone trays like Sili-Seedlings offer real advantages for some growers. Reviewers report that seedlings pop out easily with less root disturbance, the silicone is more flexible than rigid plastic, and the cells use less potting soil than traditional plastic cells. The downsides are higher upfront cost and a smaller format selection than Bootstrap Farmer or Johnny’s Selected Seeds. For growers who prioritize easy transplant and don’t mind the price premium, silicone trays are worth trying on a small batch first.
Plug trays vs. community sowing – what works best when?
Plug trays work best when you have predictable germination rates, want uniform transplant-ready seedlings, and need to maximize the use of bottom heat and grow light space. They give you discrete root systems and easy transplant. Community sowing works best for erratic germinators like ultra-hot peppers, native species with unpredictable germination, or any crop where seed cost is low and you want to use space efficiently during germination. The labor trade-off is pricking out seedlings later versus potting up individual cells from the start.
Final Verdict: Which Plug Tray Should You Buy for Your Nursery?
After three months of side-by-side testing, the Bootstrap Farmer 1020 Trays (10-Pack) earn our Editor’s Choice spot as the foundation of any nursery station. Pair them with the Bootstrap Farmer 72 Cell Tray (10-Pack) for the workhorse cell format, and you have a propagation setup that will run 5+ seasons without cracking or warping.
If you’re starting from scratch and want a turnkey bundle, the RooTrimmer 1020 and 72 Cell Combo Kit (10 Sets) gives you both the flat and the inserts in one box at a budget-friendly price. For native plant nurseries or anyone growing taproot species, the RooTrimmer Deep 72 Cell Trays are worth the upgrade for the extra vertical root room.
Whatever cell count you choose, the heavy-duty BPA-free polypropylene trays from Bootstrap Farmer and RooTrimmer will outlast budget polystyrene inserts by 3-5 seasons. Over time, that durability is what makes the best plug trays for nurseries pay for themselves.