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Nov 12 2013

Growing Green Onions in Water

Find the recipe card at the end of the post. Make sure to read the content as it contains chef tips, substitution options, and answers to FAQs to help you succeed the first time around!

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So it’s come to my attention that a lot of people didn’t know anything about green onions. When you buy them in the store they have their bulbs and roots attached.  Most just snip them down to the roots and toss the root and bulb in the trash.  When they need more they just buy another bunch at the market.

Um, why?  Seriously why do this?  I mean you are given the bulb and roots intact.  Why not just grow your own?

Greenonions

I’ve been doing this for years and have done it both indoors (in just a jar of water that I change regularly) and then when the weather breaks, in a pot outside.

Cutting The Green Onion for Water Growth

  1. Cut the onion back to where the roots, bulb, and 1″ of the white part is preserved.
  2. Going all the way to the bulb may cause the onion to not regrow

What prompted this is a TKW Family member asked how they can preserve green onions as she got a boatload of ’em and didn’t want them to go bad before she could use them all.  I gave her the instructions on how to flash freeze the snipped onions and then that all she needs to do to keep getting more is just stick the roots and remaining bulbs in freshwater.  These grow pretty fast too. Just change the water every few days, snip off what you need, and watch them regrow!

Greenonions1
Green Onion Growing Tips

  1. Change the water every 2-3 days.
  2. If the outer sheath becomes slimy (this will happen), gently peel it off.
  3. If the roots get too long and start to ball up snip them back to about 1″ long

Planting Green Onions

  1. I tend to regrow mine for 3 full growths in water and plant them in soil.
    • I found that by the 5th regrow the bulbs and roots can get slimy to the point it’s too hard to clean them.

 

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Growing Green Onions in Water

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  • Author: The Kitchen Whisperer

Ingredients

  • Green Onions with roots and bulbs in tact
  • Glass Jar
  • Water

Instructions

To Preserve Your Onions:

  1. Line a tray with parchment paper.
  2. Cut your onions down to 1″ above the bulb into pieces and place the cuttings on the parchment paper trying not to overlap.
  3. Stick the tray in the freezer for an hour or so, or until the onions are frozen.
  4. Place the cuttings in a freezer safe bag and place back in the freezer.
  5. Use when needed.

To Grow Your Onions in Water:

  1. Place the remaining stalk with the bulb and roots intact in a glass jar.
  2. Fill with water so that the roots and bulbs are covered. Do not submerge though. You want at least 1/2″ sticking out of the water.
  3. Change the water every few days.
  4. Watch them grow in no time.
  5. Snip off what you need and if they grow faster than you can use them just cut them back and preserve the cuttings!

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48 responses

  1. emma
    November 19, 2021

    Would green onion grow better in water with some nutrients, like coffee or tea water?

    Reply
    1. TKWAdmin
      November 19, 2021

      I’ve never tried those items. I do know that simple water, changed frequently works for me. I’d love to hear using those works for you!

      Best Kitchen Wishes!

      Reply
  2. Chrisitne Walker
    September 23, 2021

    When planting outside what position do they prefer? Will they grow ok in pots?

    Reply
    1. TKWAdmin
      September 24, 2021

      Hi Christine,

      I plant them in full sun, roots in the dirt (though I suspect you knew that part). Yes, I had them in pots on my porch before and as long as they have water they are good.

      Best Kitchen Wishes!

      Reply
  3. Gail Burack
    July 31, 2021

    First time trying this. I’m so excited! I’m a great ‘pit’ gardener. Veggies, fruits, flowers etc. Now I’ll be a great gardener in water. LoL.
    Thank you so much.
    You’re top notch! 👍💚

    Reply
  4. Noelle CAMERON
    June 5, 2021

    My green onions got splotches of black, what can I do?

    Reply
    1. TKWAdmin
      June 5, 2021

      That’s mold and common with green onions or onions in general. It can be caused by where you bought them, how they were green, something in the house.

      Read this article for more info.

      Best Kitchen Wishes!

      Reply
  5. kirsten morrella
    April 4, 2021

    hi, i’ve started storing my green onions in a jar in the window with a little water a couple weeks ago. Finally growing! But now I notice a clear slime (almost like aloe vera) inside the onion tubes. What is this? Is it normal? the onions I buy at the store don’t have thick liquid inside, so this weirds me out. Any thoughts?

    Reply
    1. TKWAdmin
      April 5, 2021

      Hi Kristen,

      That’s totally normal. That’s just the gel the onions emit when growing. Have you ever cut into a thicker one and it oozed out a liquidy type gel? That’s all that is. What I do is just rinse it off, change the water and it’s good to go.

      Best Kitchen Wishes!

      Reply
  6. Aisyah
    March 21, 2021

    Hello, how long does it last? Do I ever need to worry about replanting them with newer bulbs, since I suspect that nutrient from the roots will not last because it’s not seed?

    Reply
  7. MilkDuck Mary
    March 1, 2021

    Absolutely live this idea and such a money saver! Thank you!

    Reply
  8. Debbie saltzman
    February 23, 2021

    My scallions on water stopped growing. I only cut off greens as directed. What went wrong?

    Reply
    1. TKWAdmin
      February 23, 2021

      Hi Debbie!

      I’ve only had them “stop” growing in water after the 3rd or 4th snipping. That’s typically the time I transfer them to dirt. Did you change the water regularly and also not use scalding hot or freezing water? You didn’t submerge them either, correct. Just the roots and base were in the water? I’m assuming you did a single snip, changed the water as directed and waited. They typically grow in a week after the first snipping and 1-3 water changes.

      Best Kitchen Wishes!

      Reply
  9. Heather Stout
    November 22, 2020

    What do you mean by 3 full regrowths?

    Reply
    1. TKWAdmin
      November 22, 2020

      Hi Heather,

      Meaning you’ll cut it, grow it out, cut it and repeat a total of 3 times.

      Best Kitchen Wishes!

      Reply
  10. Elaine
    November 18, 2020

    Hello, my parents have been growing them right by the window with sunlight and changing the water every three days. The issue is that all of the tips have been turning a yellowish-white color and when we touch them it’s solid. Are we doing something wrong or are they supposed to turn hard and white at the tops?

    Reply
    1. TKWAdmin
      November 18, 2020

      Hi Elaine!

      I’ve had that happen too. I will snip off that part and it typically is fine after that. I’ll regrow mine in water for 3-5 times then plant in soil for long term/next year growing outside.

      Best Kitchen Wishes!

      Reply
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