Onion Seeds

Compare options in Onion Seeds by variety details, growing traits, and packet information.

Check Each Product Listing

Seed source, certification, treatment status, life cycle, and packet size vary by item. Organic certification applies only when it is stated on that product page.

Seed Germination Policy

Review the current terms, restrictions, storage requirements, and claim process before purchase.
Onions growing in a garden row

Shop onion seeds for bulb onions, bunching onions, scallions, specialty shapes, and storage varieties. Compare color, flavor, day-length adaptation, maturity, and harvest use to select a variety for your region and planting schedule.

Choose Onion Seeds by Day Length

  • Long-day onions: Generally best adapted to northern regions where summer days are longest.
  • Short-day onions: Commonly grown in southern regions with milder winters and shorter day-length triggers.
  • Intermediate-day onions: Suited to many areas between the traditional long- and short-day zones.

Latitude, planting season, and local climate all influence bulb formation. Use the individual product page and packet to confirm the adaptation of a specific variety.

Bulb Onions, Bunching Onions, and Scallions

Bulb varieties are selected for fresh use, cooking, or storage. Bunching onions and scallions are grown for tender stems and may be harvested at several stages. Specialty selections add different colors, shapes, and flavor profiles to the garden and kitchen.

Starting and Growing Onions from Seed

Onions can be direct-sown or started as transplants depending on climate and season length. Follow the packet for sowing depth, temperature, spacing, and transplant timing. Provide full sun, fertile well-drained soil, even moisture, and consistent weed control around shallow roots.

For a quicker start with fewer variety choices, compare onion sets. Browse the full vegetable seed collection for companion crops.