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Seed Germination Trays

Match a humidity dome to the tray rim

Check the rim, usable headroom and vent position before buying a separate dome.

Check where the lid rests

The cover may sit on a rim, clip into a base, or rest over an insert in a matched system. Use the actual lip and maker’s fit guidance to choose a documented pairing.

Measure clearance above the medium

The advertised outside height may include a handle, vent or skirt. Measure usable headroom above the growing medium if the dome will cover a deep tray or a taller start.

Choose the vent arrangement

Some covers have adjustable vents, while others offer fixed openings or rely on lifting the lid. Compare access to those openings in the actual position on the shelf.

Source documentation

Guide questions

Can a tall dome fit any nominal 1020 tray?

Check both the rim profile and dimensions. Tall describes vertical size and leaves the rim fit to verify.

Does an adjustable vent seal the cover?

The vent changes the available openings. Check how the dome sits on the tray rim and what the maker documents.

Do I need a base with a cover-only listing?

Use a compatible base if your setup calls for one. A cover-only offer gives the lid and its listed components.

Which accessory suits the job?

The four-inch PJT cover uses less vertical space. The 7.3-inch BTPLASTIK cover leaves more room above a compatible rim if your shelves allow for it.
PJT 4-inch vented 1020 humidity domes, pack of 15 ↗BTPLASTIK 7.3-inch 1020 humidity domes, pack of 10 ↗
The RooTrimmer cover is listed at 6.3 inches tall and the Bootstrap Farmer cover at a 5.4-inch maximum outer height. Choose based on rim fit and measured headroom.
RooTrimmer 6.3-inch vented 1020 humidity domes, pack of 10 ↗Bootstrap Farmer 1020 humidity domes, pack of 2 ↗

Accessories in this guide

RooTrimmer 40-cell extra-deep plug trays, pack of 10 ↗

Choose the 40-cell extra-deep version if cell depth is a priority and you can allocate the extra height on the bench.

RooTrimmer 6.3-inch vented 1020 humidity domes, pack of 10 ↗

Choose these domes when you need more cover clearance than a low germination lid offers.

RooTrimmer 32-cell extra-deep flats and bottom trays, ten sets ↗

This bundle pairs 32-cell extra-deep inserts with solid bases.

RooTrimmer 18-cell wide deep plug trays, pack of 10 ↗

The 18-cell version has broad three-inch square openings.

Bootstrap Farmer 1020 humidity domes, pack of 2 ↗

The Bootstrap Farmer dome is designed to rest on the rim of a deep 1020 tray.

RooTrimmer 50-cell deep flats and bottom trays, ten sets ↗

This set gives 50 planting cells per insert with a corresponding bottom tray.

RooTrimmer 32-cell extra-deep inserts, pack of 10 ↗

Choose this 32-cell insert when the planned plugs need greater depth than a shallow flat gives and a separate base is already available.

MIXC tall 1020 humidity domes with four vents, pack of 10 ↗

The MIXC cover provides four adjustable vents and a tall profile.

RooTrimmer low 72-cell inserts and TD538 bases, ten sets ↗

This bundle pairs the low 72-cell RooTrimmer insert with a solid TD538 base.

RooTrimmer 54-cell deep inserts for TD377, pack of 5 ↗

The 54-cell insert is for RooTrimmer’s shorter TD377 format.

Bootstrap Farmer 72-cell 1020 starter kit, ten sets ↗

This kit suits a larger batch where each 72-cell insert needs a matching no-hole base and vented cover.

RooTrimmer low 1020 humidity domes, pack of 10 ↗

Choose this low cover when shelf space is limited and the insert and seedlings have enough measured clearance.

RooTrimmer no-hole 1020 trays and 7.3-inch domes, ten sets ↗

This bundle pairs a solid 1020 tray with a tall clear dome.

RooTrimmer 17 × 12-inch nursery trays with removable mesh, five sets ↗

This bundle combines a tray with a removable mesh support and a drain fitting.

RooTrimmer medium trays with 5-inch vented domes, four sets ↗

Choose this medium base and cover set when the bench has room for a shorter tray but needs a taller cover.

RooTrimmer deep 72-cell inserts and solid bases, ten sets ↗

Choose the deep 72-cell bundle when a high cell count and a compatible runoff tray are both needed.

ILITING 1020 mesh and no-hole trays, five pairs ↗

This bundle combines an open mesh support with a solid receiving tray.

Jiffy low 1020 humidity covers, pack of 10 ↗

These low covers suit a bench where shelf height is limited and the starts fit within a shallow lid.

RooTrimmer 1020 mesh and solid bottom trays, ten pairs ↗

This RooTrimmer kit supplies a mesh support and a receiving tray for each position.

Bootstrap Farmer solid 1020 trays and humidity domes, five sets ↗

Choose this bundle when you need a solid flat and clear dome together.

SOLIGT 1014 medium 5-inch humidity domes, pack of 5 ↗

Choose these covers for the medium SOLIGT tray named in the listing.

Bootstrap Farmer 32-cell 1020 starter kit, two sets ↗

Choose the 32-cell starter kit when you need two complete positions with an insert, a base and a dome.

Burpee SuperSeed 36-cell pop-out tray with watering base ↗

Choose the SuperSeed 36-cell kit when the flexible cells and included watering base suit a smaller indoor batch.

Bootstrap Farmer 1010 vented humidity domes, pack of 10 ↗

Choose this near-square dome when a shorter 1010 bench position needs a cover.

Gardzen 40-cell germination trays with vented domes, five sets ↗

This Gardzen offer divides 200 cavities among five 40-cell setups.

MIXC 12-cell propagation kits, ten sets ↗

Choose this MIXC kit when you want ten small groups with a cover for each one.

Bootstrap Farmer deep mesh and solid 1020 trays, five pairs ↗

This pair is for blocks or growing cubes that need a draining platform over a solid reservoir.

RooTrimmer clear four-cell modules and 1020 bases, five sets ↗

This set puts eight removable four-cell modules in each base.

BTPLASTIK 7.3-inch 1020 humidity domes, pack of 10 ↗

A taller dome leaves extra room above upright cuttings when a short cover would touch the tips.

PJT 4-inch vented 1020 humidity domes, pack of 15 ↗

Use a four-inch cover when the gap under a grow light or shelf is limited.

Bootstrap Farmer green 1010 starter kits, four sets ↗

Four small domed stations let you start batches on different dates without occupying one long shelf.

Gardzen 70-cell Smiling Face propagation kits, five sets ↗

Five separate covers let you manage large groups at different stages while keeping each 70-cell insert over its own catch tray.

VIVOSUN 12-cell propagation kits, six sets ↗

These six covered modules make sense when you want to separate sowings by variety or date.

MIXC 40-cell mini propagation kits, five sets ↗

This 40-cell station fits between the small 12-cell modules and a long 1020 setup.

AC Infinity AC-HDA5 40-cell kit with height extension ↗

This 40-cell station can start under the standard lid, then gain headroom when you install the extension panels.

SOLIGT 24-cell capillary-mat starter kits, six sets ↗

Choose this set if you want a wick to draw water from the reservoir while two removable inserts sit on supports above it.

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