Harvesting and Drying Onions

We planted red and white onions on February 1, 2014. Once the green above ground onion leaves were about 4 inches, in March, mulch was added to the raised bed.

Onions signal that they are ready for harvest when the green portion bends at the “neck” and falls over (see “Onion Plant Bending at Neck”). Some people harvest when about 1/4 of the total onion crop has bent to the ground, but we harvest each onion as it indicates it is ready.

Onion Plant Bending at Neck

Onion Plant Bending at Neck

Once the green portion bends at the neck, the onion bulb will stop growing. Leaving the onion in the ground at this point can result in rot—especially if humidity and temperature are high (as we often experience in this area and further south).

Onions Drying

Onions Drying

Post harvest bulb rot is the greatest threat to successful storage of onions. The key to success is to dry onions in relatively cool (75 to 85 degrees F) and dry (low humidity) conditions. If our weather is cooperative, we can dry them on a table in the garage. I have also dried them on a table in the house (see “Onions Drying”).

Place the onions flat (I put them on newspaper) and spaced apart (I stagger the bulbs left and right) to allow the best air flow for drying. The drying process takes about 10 days. The picture below illustrates onion drying from freshly picked (left) to fully dry (right). Once dry, we cut the top off and store.

Stages of Dry Onions

Stages of Dry Onions

Once the onion tops are dry, the onion can be stored. remove the dried top just above the “neck” of the onion (about an inch above the top of the bulb itself) and remove the roots (see below).

Picture--Remove Onion Top and Roots

Remove Onion Top and Roots

To ensure that the onion top is fully dry, I leave the onions out on the counter or table for a few more days. The worst thing that can happen to the onion at this time is neck rot — a post-harvest rotting of the bulb (rotting onion produces quite a stench, not easily forgotten once experienced). It has taken 3 1/2 months to get to this stage … just a few more days for successful storage.

Once fully dried, store the same as onions purchased from the store. Enjoy the fresh onions!



2 thoughts on “Harvesting and Drying Onions

    • Thanks for Sharing, Kathy. I’d love to see a few pictures of your plaited onions (I took the easy path, dry and then bag)! This is the first year we’ve had a decent onion crop (about 100 average to large sized), so I’m very impressed with the work you did for 300! ~~Christine

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s