Since bulb onions mature in response to changing amounts of daylight there are varieties that work best depending on what part of the county you live. Short-day varieties grow best in the South. Intermediate-day varieties are grown best in the northern Arizona to Washington D.C. area, and Long-day varieties are best suited for the North. However, there are exceptions to the rules: The Intermediate-day varieties can be grown as early onions in the North....which is what we did.
The best soil for these guys is slightly acidic and well-drained. When the tops start to lay over (by themselves) as in the 2nd photo, then you know they are ready to harvest. Then to cure the onions you just place them in a warm, dry place and away from direct sunlight. Short-day varieties cure for a few days before you clip off the tops and roots. Intermediate-day and Long-day varieties cure for up to three weeks. Most properly cured onions should store up to 8 months in a cool basement or root cellar. Using a mesh bag or other "breathable" material to store them is advisable. Be warned that sweet onions do have a shorter storage life than most.
A bit of trivia to leave you with: Did you know the sweet onion became the Texas state vegetable in 1997?
I want bulb onions this year. Last October, I purchased sets from my local Lowes, and they've been in the garden ever since. I'm really not sure what to expect, as I really need to be educated in growing them! It is just a plain white variety, but I don't know if they're short-day like is recommended. Any input? Thanks for all suggestions!
ReplyDeleteEG: did you pull any onions to check the progress? I have read where extended cold periods (longer than a week or so) below freezing can kill them. I know that I have the best success when I purchase the sets from a seed company rather than the store...maybe some of those bulbs sit around too long. Also, since onions have such a shallow root system, they do require lots of water for optimal growth. Anyone have further suggestions?
ReplyDeleteThat is one prized onion you have there. I have always wanted to grow big onions but have yet to have any luck. I grow the right variety, start them early, water well, fertilize well and all I get is tennis balls at best. Maybe this year I will have better luck... Good luck with you competition.
ReplyDeleteSunny, i've pulled about 6 - but no bulbs to speak of. They get watered and fertilized pretty well, and are hardy down to a temp of around -20. I'll just wait 'em out, I guess.
ReplyDeleteGood luck EG...I'm sure your patience will pay off :)
ReplyDeleteThanks Dan...I entered them in the fair and accidentally labeled them as white onions when they should have been yellows :( Needless to say, I didn't place because of it...details, details... I have learned my lesson :)
I like your post.It is full of learnings that are very useful.
ReplyDeleteThe thing that has stopped me from growing bulb onions is that they are photo sensitive. That is when the days get so long, they start to bulb. That's swhy most onions, like texas sweets, Walla Walla etc grow in hot climates, where they get a great big head start in the spring. If grown outside a greenhouse up here, they stay small, then when bulbing produce small bulbs. Are u growing them in a greenhouse?
ReplyDeleteThanks Hydro!
ReplyDeleteBV: I didn't grow them in the greenhouse...rather we started the bulbs in the garden in April of last year and harvested them this past summer.