How to Regrow a Sprouted Onion in Your Garden

by Chrystal Johnson on March 26, 2014

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sprouted-onionDo you ever find an onion that has been at the bottom of the pile and discover it has started sprouting? I used to get so upset that I had wasted food. Then one day I started wondering whether I could use that sprout to grow a new onion.

I found a whole lot of information saying that it wasn’t possible. Then I stumbled across this post, and it gave me new hope. I decided to give it a try next year, and I was so excited that it worked!

The process to regrow a sprouted onion is surprisingly simple.

1. Cut carefully into the onion lengthwise to expose the center sprout.


2. Remove the outer layers of the onion, until you just have the center sprout remaining. As long as the outer layers of the onion are still firm, you can eat them. If they’re soft, discard them. If there are multiple sprouts like this one, separate them.


3. Place the onion stem into a cup or bowl of water, and leave it there until roots start to sprout. These are the beginnings of roots. I like to leave them in the water until they’re a bit longer.

Also, notice that this one doesn’t have really long green sprouts. You can also cut the center out of onions that haven’t started fully sprouting and regrow them!


4. Once you have roots developed, transplant the onion into the ground or a container. I didn’t separate these ones, and they didn’t grow right. Take my lesson and separate all of the sprouts before planting.


5. Let them grow through the season. You can usually tell that the onion is done growing when you see the bulb emerge from the soil, or the green sprout starts to wilt and brown. If you leave them too long, they’ll soften and rot. If you pull them at the right time, you’ll have beautiful onions that you grew practically for free!


Have you ever regrown onions? What are your favorite veggies to regrow in your garden?

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About Chrystal Johnson

Chrystal, publisher of Happy Mothering, is a mother of two sweet girls who believes in living a simple, natural lifestyle. A former marketing manager, Chrystal spends her time researching green and eco-friendly alternatives to improve her family's life. She enjoys sharing those discoveries with anyone who's willing to listen.

{ 6 comments… read them below or add one }

1 Amanda March 26, 2014 at 9:37 am

I just split and re-planted a bunch of garlic and onions this weekend! Thanks for the tutorial.
Amanda recently posted..Green Your Period – Skoon Cup Review


2 Brittany @ The Pistachio Project
Twitter: PistachioProjec
March 26, 2014 at 10:12 am

Perfect timing! I just let one of my onions sit too long and now it’s sprouting!
Brittany @ The Pistachio Project recently posted..One Ingredient Grout Cleaner


3 Jessica N March 26, 2014 at 6:27 pm

I actually do this with green onions and am looking into doing it with lettuce and pineapple as well as I hear you can re-grow them.
Jessica N recently posted..Grand Opening Giveaway


4 Annie March 27, 2014 at 7:21 am

What a great idea! I use onions so often that I haven’t had one sprout in a while. Next time it happens though I’m going to try this!
Annie recently posted..DIY Mason Jar Soap and Lotion Dispenser


5 Amber March 27, 2014 at 10:28 am

Neat! Thanks for the tutorial. I’m pinning this for later!
Amber recently posted..Stinging Nettle Recipes for Spring Eating


6 Roechelle March 27, 2014 at 11:19 am

I am so going to do this with my daughter, it would double as a home ec/science project. Pinning it :)
Roechelle recently posted..Magnificent Kale: A Profile plus A Recipe Roundup


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