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Greener Thumb
Posts: 1990
Joined: Sun Apr 17, 2011 12:48 am
Location: Monterey, CA.

How/when to harvest onion bulbs?

This is my first time ever growing bulbing onions. I planted seeds of Candy and Red Bottle onions back in OCT. Not to long ago I notice they are starting to bulb up. I can recognize that a transition is about to occur. They look as though they are gonna fall over soon and they are starting to get some yellow/brown leaves. Should I cut back on watering? When? And for how long? How should I harvest and cure them? Tips are appreciated. Thanks

Super Green Thumb
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Joined: Sun Apr 10, 2011 6:52 am
Location: SE-OH USA Zone 6-A

Re: How/when to harvest onion bulbs?

Yes I might slow down on watering, and I'd dig a test onion or two to see how they have bulbed up. Once the top falls over they are done and need to be air-dried out of direct sun.
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Super Green Thumb
Posts: 7480
Joined: Mon Jan 19, 2009 3:20 am
Location: Northern Utah Zone 5

Re: How/when to harvest onion bulbs?

Generally the onion bulbs are partially out of the ground, You don't need to dig nor pull to see them. When the tops are looking as you say, maybe thinking about falling over, go ahead and smash them over. Lay them down as in this picture.


Now leave them like that until the tops dry up. Then pull the onions and leave them lay on top of the ground for a while longer to dry well. If the weather is wet, bring them in the garage and spread them out to dry. They need to dry well for storage. When dry cut the tops off and store them.

Also be advised that if you want an onion to eat, you can pull one anytime. Have fun!
Gardening at 5000 feet elevation, zone 4/5 Northern Utah, Frost free from May 25 to September 8 +/-

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