Onion Sets for Sale

So easy to grow from sets for scallions or full size onions

White, red, and yellow onion sets

Onion Sets

Shop onion sets for sale in yellow, red, white, and sweet varieties. These small, ready-to-plant bulbs give gardeners a head start compared with starting onions from seed. Choose sets for green onions, full-size bulbs, or a storage onion crop, depending on the variety and your growing conditions.

Choose Onion Varieties by Day Length

Bulb formation is strongly influenced by day length. Long-day onion plants are generally suited to northern regions, short-day onion plants to southern regions, and intermediate-day types to areas between them. Review each product page before ordering because the best match depends on latitude, planting season, and intended harvest.

Available onion varieties and pack sizes change seasonally. Compare individual listings for bulb color, flavor, day-length adaptation, and other traits rather than choosing by color alone.

How to Plant Onion Sets

  • Timing: Plant when the soil can be worked and conditions suit the variety. In many areas, this is early spring; some regions also support fall planting.
  • Site: Select a sunny bed with fertile, well-drained soil.
  • Depth: Place each set pointed end up, with the tip near the soil surface. Follow the product directions for exact depth.
  • Spacing: Space sets for the bulb size you want. Full-size onions need more room; closer plantings can be thinned and harvested as green onions.
  • Care: Keep the bed evenly moist but not waterlogged, and control weeds that compete with shallow onion roots.

Harvesting and Storing Grown Onions

Harvest green onions whenever they reach the size you prefer. For mature bulbs, wait until the tops begin to yellow and fall, then lift the bulbs carefully. Cure onions in a dry, well-ventilated place before storage. Storage life varies by onion type, curing conditions, and temperature.

Days to maturity vary widely. Some varieties may be ready in a few months, while others can take around 110 days or longer. Use the current product page or package as the final guide for timing.

Onion Sets or Onion Seeds?

Sets are convenient for gardeners who want a simple start and an earlier crop. Seed offers a wider choice of cultivars and more control over transplant timing. Compare both approaches in our vegetable seed collection, and see the onion growing guide for additional planning help.