The standard 1020 greenhouse flat without drainage slots.
Use with Jumbo Plug Flats and Pro-Tray Cell Flats to contain water drainage and for bottom-watering applications. All are standard size. 11 inches wide by 21 inches. Trays are made of 80% recycled scrap polystyrene and are reusable and recyclable. Compatibility: Use with Pro-Trays, Jumbo Plug Flats, Soil Block Propagation Trays,and Mini Square Plastic Pot.
They will hold 18 each 4 by 4 inch pots. They measure 21 inches long by 11 inches wide by 2 inches deep.
Fill the bottom tray to water the seeds in the pots so you do not dislodge the seed by top watering. With our germination mix, the right amount of water will be absorbed for proper watering.
I use these in my greenhouse to start seeds.
They are reusable. They last over several seasons before cracking.
We suggest using two of these trays when filling with 18 each 4 inch mini square pots.
Roadsideorganics
STRONGEST0.088" gauge starting thicknessno holes
Provide your seedlings with a spacious and durable place to sprout by getting our heavy-duty plant trays. The 1020 tray - so-called because it measures just over 10 inches wide by 20 inches long - is the industry standard for seed trays. This heavy-duty thermoformed tray is heavier than standard 1020 trays so it holds up to many seasons of seed starting or fodder growing.
The design of our 1020 greenhouse trays allows community watering of pots and inserts with easy two-finger de-nesting. The consistent bottom and side-positioned drainage holes remove excess water. You can also order 1020 plant trays without holes if you're using them for transplanting or storage. Both trays come with no center bar or side ribs to maximize available space.
NOTICE: Avoid excessive heat. Do not store outside, especially in direct sunlight. Extreme temperatures may cause empty containers to deform.