Seed Starting Trays, Domes & Flats | Johnny's Selected Seeds

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Johnny's offers a selection of seed starting trays, flats, and humidity domes to accommodate whatever it is you decide to grow. All of our seedling products follow industry 1020 tray standard size (actual footprint: 11" x 21"). We offer supplies that are economical enough to be disposable, but are heavy-duty enough to be reusable over multiple seasons, including: germination trays with and without drainage holes; microgreens trays; mesh trays; cell flats; and clear plastic domes. Available in small and case quantities. To compare products, including compatibility across products, see our Trays, Domes & Flats Comparison Chart (at right).

Trays, Domes & Flats | Comparison Chart (PDF)

61 Products

Pro-Tray 72 Cell Flats – 100 Count Cell Flats

Pro-Tray 72 Cell Flats – 100 Count

For home and market gardeners. Round cells.

Pro-Tray 24 Cell Flats – 100 Count Cell Flats

Pro-Tray 24 Cell Flats – 100 Count

For home and market gardeners. Round cells.

Paperpot Seedling Trays – 10 Count Transplanters

Johnny's Exclusive

Paperpot Seedling Trays – 10 Count

Paperpot Transplanter Accessory

Tray sized specifically for Paper Chain Pots.

Heavyweight Mesh Tray – 5 Count Support Trays

Heavyweight Mesh Tray – 5 Count

Heavy duty support for other seedling containers.

Shallow Leakproof Trays – 36 Count Support Trays

Shallow Leakproof Trays – 36 Count

A great multi-use tray for any operation.

Jumbo Plug Inserts – 100 Count Cell Flats

Jumbo Plug Inserts – 100 Count

Large cells can be separated into six-packs.

Soil Block Propagation Trays – 50 Count Trays, Domes, and Flats

Soil Block Propagation Trays – 50 Count

These wide-mesh bottom trays are ideal for soil block propagation.

Paperpot Seedling Tray - Individual Transplanters

Paperpot Seedling Tray - Individual

Paperpot Transplanter Accessory

Tray sized specifically for Paper Chain Pots.

Medium Weight Mesh Tray – 50 Count Support Trays

Medium Weight Mesh Tray – 50 Count

Reinforced support for other seedling containers.

NanoDome – Single Grow Lights and Carts

NanoDome – Single

LED or T5HO Strip Light Accessory

Humidity dome with groove for resting a grow light.

Maxi Square Plastic Pots – 540 Count Plastic Pots

Maxi Square Plastic Pots – 540 Count

For larger seedlings like peppers and tomatoes.

20-Row Seed Flats – 50 Count Cell Flats

20-Row Seed Flats – 50 Count

Ideal for seed starting.

Lightweight Mesh Tray – 50 Count Support Trays

Lightweight Mesh Tray – 50 Count

Compact, low-cost support for other containers.

Pro-Tray 38 Cell Flats – 100 Count Cell Flats

Pro-Tray 38 Cell Flats – 100 Count

For home and market gardeners. Round cells.

NanoDome – 5 Count Grow Lights and Carts

NanoDome – 5 Count

LED or T5HO Strip Light Accessory

Humidity dome with groove for resting a grow light.

Seedling Trays – 100 Count Support Trays

Seedling Trays – 100 Count

The standard 1020 greenhouse flat with drainage slots.

Hard Plastic Perma-Nest Trays – 6 Count Trays, Domes, and Flats

Hard Plastic Perma-Nest Trays – 6 Count

Durable trays for our Seedling Light Carts.

Leakproof Trays – 100 Count Support Trays

Leakproof Trays – 100 Count

The standard 1020 greenhouse flat without drainage slots.