If you are looking for seed trays for nursery, you have probably seen the phrase “standard size” or “1020”. You might be wondering what these phrases mean, and how to interpret the language.

"1020" refers to the tray length and width, approximately 10 inches and 20 inches. That is 54 * 28cm.

1020 seed tray has separate cells for individual plants. This makes it easier to space out seeds properly, and allows you to transplant without harming the roots of your plants (since the roots of separate plants will not get tangled up together due to separated cells).

Most standard 1020 seed trays can be fitted with flat tray and humidity dome.