Green Onion Plants In Water: Tips On Growing Green Onions In Water

Scallions in vase with water.
Image by Alton Applewhite

By Liz Baessler

It’s one of the best kept secrets that there are some vegetables you need only buy once. Cook with them, place their stumps in a cup of water, and they’ll regrow in no time at all. Green onions are one such vegetable, and they work especially well because they’re usually sold with their roots still attached. Keep reading to learn more about how to grow green onions in water.

Can You Regrow Green Onions in Water?

We are often asked, “Can you grow green onions in water?” Yes, and better than most vegetables. Growing green onions in water is very easy. Usually, when you buy green onions, they still have stubby roots attached to their bulbs. This makes regrowing these useful crops an easy endeavor.

How to Grow Green Onions in Water

Cut the onions a couple inches above the roots and use the top green part to cook whatever you like. Place the saved bulbs, roots down, in a glass or jar with just enough water to cover the roots. Place the jar on a sunny windowsill and leave it alone apart from changing the water every few days.


Green onion plants in water grow very quickly. After just a few days, you should see the roots growing longer and the tops beginning to sprout new leaves.

If you give them time, your green onion plants in water should grow right back to the size they were when you bought them. At this point you, can cut the tops off to cook and start the process right over again.

You can keep them in the glass or you can transplant them into a pot. Either way, you’ll have a virtually inexhaustible supply of green onions for the cost of a single trip to the produce section of your grocery store.

Print This Article
This article was last updated on
Did you find this helpful?
Share it with your friends!

Additional Help & Information

Didn't find the answer to your question? Ask one of our friendly gardening experts.

Do you know anything about gardening? Help answer someone's gardening question.

Read more articles about Onions.

Search for more information

Use the search box below to find more gardening information on Gardening Know How: