Seed starting containers: trays vs individual pots
Oklahoma State says seeds can start in a tray or in individual containers, and should move to larger ones once the roots fill them.
What the sources say
- Oklahoma State: seeds can start in a seed tray or individual containers. Transplant to larger containers once sprouts fully root, because containers that are too small cause root-bound plants that wilt.
- Cornell Monroe: cucumbers and squash are started in individual plantable pots, which can go in the ground with the plant. Beans, beets, carrots, peas and fennel are direct sown and not started indoors.
- NDSU: use containers with drainage holes if you plan to bottom water, set inside a second container. See watering seedlings.
Fitting them on the shelf
- A 1020 tray is about 21 x 11 inches outside. See trays per shelf.
- Pots take height. The distance between the tray and the light changes as plants grow. See hanging height.
- For trays with domes, see trays and domes.
Sources
- Oklahoma State University Extension: Tips for starting seeds at home (2025)
- Cornell Cooperative Extension, Monroe County: Starting vegetables from seed
- NDSU Extension, Dakota Gardener: Watering and waiting
Related
- How many seed trays fit on a wire shelf
- Seed Germination Temperature Chart for Common Vegetables
- Do Seeds Need Light to Germinate?
- Seed Starting Mix vs Garden Soil
- How to Water Seedlings: Bottom Watering and Moisture
- Seed starting shelf light calculator
- Main guide to grow lights for a seed starting shelf