A different seedling tray for each specific purpose

Bill Kerr explains the different types of seedling trays available to vegetable producers. They vary in type of material and shape of cavities.

- Bill Kerr

There is the perception that seed tray cavities should have angles to prevent the seedlings from becoming root bound, but I haven't experienced this. Whether the cavities are round or pyramid-shaped, I have found that when transplanted, the seedling roots grow immediately at a right angle into the soil.

The material that the trays are constructed from does make a difference, however. Plastic trays, being smoother, makes for easier removal of the plugs as well as cleaning and sterilisation. However, they are usually more expensive if they are ridged. Those made from thinner plastic are floppy and more difficult to handle, but can still be very effective in many circumstances.