Onion & Leek Plants

Onion Plants-Ailsa Craig

Onion Plants-Ailsa Craig

XN500

105 days. Long-day variety. This English heirloom is a blue ribbon winner! This huge 2 pound, 6-8 inch, straw yellow globe onion is amazingly sweet and firm for its size. A sweet Spanish type, Ailsa Craig is reported to be a longer storing onion than other sweet Spanish types. Perfect for burgers and salads.

Onion plants are shipped directly from the grower January through early May, according to where you live.

PLEASE READ: Not available to Hawaii, Idaho, or Canada.
Cases not available to AK.

To check the estimated ship date for your area click here

   Open Pollinated
One Bunch = 4 - 6 dozen plants
  • XN500/C
  • Sold Out
    For 2018.
  • $15.95

  • XN500/D
  • Sold Out
    For 2018.
  • $87.95
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Culture
• Onions are photoperiodic plants — they regulate their stages of growth by day length
• Onions will make top growth until the critical light duration is reached, then bulbing begins
• The amount of growth and development prior to bulbing will determine the bulb size
Long-day varieties do well in northern states where summertime day length is between 14-16 hours
Short-day varieties do well in southern states and bulb when day length is 10-12 hours; they won't get very large in northern states
• Dividing line between short-day and long-day varieties is generally accepted as 36° latitude, roughly along the Kansas/Oklahoma border
Day-neutral and intermediate-day varieties start bulbing when day length is 12-14 hours; can be successfully grown anywhere
• Onions prefer light, sandy, loamy soils

Transplanting
• Plant your onions 4-6 weeks before the last estimated spring freeze
• Apply 1/4-1/2 cup of TSC's Complete fertilizer per 5 row feet, 1-2 inches below transplant
• Plant the onions 1 inch deep and no deeper, as this will inhibit their ability to bulb
• If you want the onions to grow to maturity, space them 4 inches apart
• If you prefer to harvest some earlier as green onions, space them 2 inches apart and pull every other onion during the growing season, leaving the rest to grow to maturity

Insects & Diseases
Common insects: Onion thrips and maggots
Insect control: Neem oil or Predatory Nematodes
Common diseases: Fusarium basal rot, pink root
Disease prevention: 5-7 year crop rotation

Harvest & Storage
• As bulbs approach maturity, withhold water so protective paper can form
• After about half the tops have fallen, push over the remainder; wait about 1 week then harvest
• Cure in a warm (75-80°F), shaded, well-ventilated location until outer skin and necks are dry, then trim tops, leaving one inch above the bulb
• Store in a cool, dry, well-ventilated area
• Check occasionally and immediately remove any sprouting or rotting onions