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When to Plant Onion Seeds


Onions are straightforward to develop from seed, however you should begin early. Within the Northern Hemisphere, sow onion seeds indoors in January and February, outdoor in April or Might.

Onion bulb formation and daylight

Onion bulb formation is influenced by the size of daylight and the hours of darkish every day. So-called long-day onions kind bulbs when daylight grows longer in spring than the darkness of evening. Quick-day onions kind bulbs when the hours of evening and day are practically equal or when nighttime hours are longer than daylight.

Plant long-day onion varieties in northern areas and short-day onion varieties in southern areas. Daylight in northern areas grows longer than nights as summer season approaches, and daylight grows shorter in southern areas as summer season approaches.

Backyard facilities generally carry the suitable onion varieties for the gardeners of their area.

Onion planting time and harvest

Onions began from seed indoors in late winter ought to kind bulbs for summer season harvest. Onions began from seed within the backyard in mid to late spring may be grown as summer-bunching onions or fall-storage onions.

Onion seeds germinate finest at 65℉ to 80℉ (18℃ to 27℃), however younger vegetation ought to be grown in cooler temperatures, close to 60℉ (16℃) and never hotter than 70℉ (21℃) by day and 50℉ (10℃) by evening.

Onion planting dates for summer season harvest

(These dates are for the Northern Hemisphere)

Common date of the final frost Planting dates
Jan. 30 Jan. 1-15
Feb. 8 Jan. 1-15
Feb. 18 Jan. 1-15
Feb. 28 Jan. 1-Feb. 1
Mar. 10 Jan. 15-Feb. 15
Mar. 20 Feb. 10-Mar. 10
Mar. 30 Feb. 20-Mar. 15
Apr. 10 Mar. 1-Apr. 1
Apr. 20 Mar. 1-Apr. 1
Apr. 30 Mar. 15-Apr. 15
Might 10 Apr. 1-Might 1
Might 20 Apr. 20-May15
Might 30 Might 1-30
June 10 Might 10-June 10
Onions in garden
Onion seedlings within the backyard; plastic sheeting warms the soil and retains down weeds.

Onion planting particulars

  • Sowing depth: ½ inch (1.2 cm)
  • House between plant after thinning: 3-4 inches (7.6-10cm)
  • Days to sprout: 10; begin seed indoors 4 to six weeks earlier than setting transplants within the backyard
  • Days to reap: 95-130
  • Storage interval: 12-32 weeks
  • Seeds per 100 row ft: ½ ounce (14 grams)
  • Yield per 100 row ft: 100 kilos (45 kilos)
  • Prompt varieties: Verify at a backyard middle or name the cooperative extension for varieties suited to your location.
  • Word: Management weeds whil vegetation are spindly and defenseless.

Associated articles of curiosity:

Find out how to Develop Onions

Rising Onion Bulbs: Decide the Proper Selection for Your Backyard

Planting Onions

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