Seed & Propagation Trays FAQ
What is the difference between seed trays and plug trays?
Seed trays are open or shallow trays for starting seeds and growing on seedlings. Plug trays have individual cells that produce uniform plugs with intact root systems, ideal for transplanting without disturbing roots. Plug trays suit production where consistent, easily transplanted seedlings matter; open trays suit broadcasting seed or growing on before pricking out.
What are deep plug trays used for?
Deep plug trays provide more root depth, producing seedlings and cuttings with stronger, more developed root systems before transplanting, which suits plants that need root development or will be held longer. The extra depth supports better-established plugs. For crops that benefit from deeper rooting or longer holding, deep cells outperform shallow trays in transplant quality.
What tray works best for propagating cuttings?
Propagation trays, often with humidity domes, create the moist environment cuttings need to root, while cell or plug trays keep cuttings separated with room for root development. Deep cells suit cuttings that root slowly or need more root space. Matching the tray to the cutting type and providing appropriate humidity is what supports successful propagation.
How do I choose cell size and count for a tray?
Cell size and count trade off: more cells per tray means smaller plugs and higher density for efficient production of many small seedlings, while fewer, larger cells suit plants that need more room and time. Match the cell size to the crop and how large the plugs grow before transplanting. The right density balances production volume against plug size.
Are seed and propagation trays reusable?
Trays can be reused across seasons if cleaned and sanitized between uses to prevent carrying over diseases and pests, since reused trays can spread pathogens to new seedlings. Inspect for cracks before reuse. Reusing sound trays controls cost, but the sanitation step is essential, since propagation is especially vulnerable to disease carried on dirty trays.
Can seed and propagation trays be ordered in bulk?
Yes. Seed trays, plug trays, and propagation trays are stocked in bulk quantities across cell sizes and depths, with volume pricing by quote. Production growers go through large numbers of trays each season, so ordering in volume ahead of the season in the cell sizes their crops need keeps propagation supplied.
