How deep to plant onions

Plant onion seeds ¼ inch deep, and sets or transplants ¾ inch deep, never deeper than 1 inch.

The depth: Seed onions for bulbs ¼ inch deep; plant sets or transplants ¾ inch deep and 3 inches apart, and do not transplant onions more than 1 inch deep.

Onions grow best in full sunlight and well-drained soils.
Work the soil 8 to 10 inches deep before seeding or transplanting.
Seed onions for bulbs during October through December.
Plant sets or transplants ¾ inch deep and 3 inches apart.

The mistake to avoid: Do not transplant onions more than 1 inch deep.

Planting depth varies with soil type and variety; your local extension office is the closest authority.

What are common onion seed planting mistakes?

“Planting too early, with exposure to cold temperatures, can cause seed stalk development.” — extension.umd.edu

Planting onion seeds too early exposes them to cold temperatures. That cold exposure can cause seed stalk development instead of normal bulb growth. Wait until conditions are warm enough before sowing.

Grounded in: agrilifeextension.tamu.edu. Every window and number follows sentences verified verbatim on those pages.

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