DeGroot

Menu

Sweet Onion

Sweet onions are a delicious addition to the garden, especially for those who love to cook! This tasty onion has more residual sugar than average onions offering exquisite flavor, particularly when caramelized or roasted. Sweet Onions may also be canned, pickled, or enjoyed raw. It stores well when braided and is well-adapted to northern climates.

  • Well-adapted for northern climates
  • Excellent container plant
  • Deer and rabbit resistant
  • Delicious for caramelizing, roasting, canning, pickling, or raw

Fall Planting: Planting onions in the fall helps establish strong roots before winter dormancy.   Plant in the fall, 4 to 6 weeks before the ground freezes. Onions perform best in well-drained, fertile soil. 1. Push the sets 1-2” into the soil at 3-6” intervals. 2.Cover with 1-2” of soil. 3. Water regularly during the growing season. After planting, apply mulch after soil has cooled (not immediately after planting) to prevent frost heaves, retain moisture, and moderate soil temperature.  In Zones 5-6, apply 4-6” of mulch (straw or shredded leaves).  In Zones 7-9, apply 1-2” of mulch (less mulch in warmer areas).  In spring, pull back mulch slightly.  Dry bulbs will be ready for harvest in spring thru summer when tops have dried and fallen over naturally.  Lift onions gently and store in cool, dry conditions.

Plant Details +

Botanical Allium cepa
Common Name Sweet Onion
Height 10-12"
Spacing 2-6"
Hardiness Zones 2-9
Exposure Full Sun
Foliage Green
Fruit Yellow
Harvest Spring Planting: 3 months; Fall Planting: Spring to Summer

Planting/Care Instructions +

Planting Instructions: Plant 4 to 6 weeks before the last spring frost in well-drained, fertile soil in full sun. Push the sets 1–2" into the soil at 3–6" intervals for dry onions. Cover with 1–2" of soil. Fertilize at the time of planting and side dress 4 to 5 weeks after planting. Water when is the soil is dry. Fall Planting: Planting onions in the fall helps establish strong roots before winter dormancy. Plant in the fall, 4 to 6 weeks before the ground freezes. Onions perform best in well-drained, fertile soil. 1. Push the sets 1-2” into the soil at 3-6” intervals. 2.Cover with 1-2” of soil. 3. Water regularly during the growing season. After planting, apply mulch after soil has cooled (not immediately after planting) to prevent frost heaves, retain moisture, and moderate soil temperature. In Zones 5-6, apply 4-6” of mulch (straw or shredded leaves). In Zones 7-9, apply 1-2” of mulch (less mulch in warmer areas). In spring, pull back mulch slightly. Dry bulbs will be ready for harvest in spring thru summer when tops have dried and fallen over naturally. Lift onions gently and store in cool, dry conditions.