How to Regrow Green Onions





Introduction: How to Regrow Green Onions

About: Hi, I'm Shari! I'm a busy wife and mom with two tween/teen daughters, and I work full-time. You'll find that the recipes and products in my blog have become huge time-savers for my family.

If you’re like me, you buy green onions for certain dishes, but whatever you don’t use ends up going bad in the fridge. I’ll want to use them for another recipe only to find that they have morphed into a mystery bag of spoiled mucky green slime in the bottom drawer. Please don't judge, I can't be the only one, right? Maybe I'm the only one who will admit it in an Instructable.

What if you could just regrow those green onions so they don't go bad in the first place??? Hopefully you'll forgive my "lost bag of green onions" incident and check out my blog for my easy recipes for busy families. Find more info at

Original post for regrowing green onions is at How to Regrow Green Onions.

Step 1: Cut the Onion About One Inch From the Root End

Use your green onion in your favorite recipe, but save the root end to regrow new ones!

Ok, sorry, but this is not rocket science here. I was floored when I found out you could do this. Just save the bulb ends and place them root side down into a narrow cup. Add about 3/4 inch of water and put it near a window to grow more green onion goodness! Just change out the water every couple of days.

You should check out my blog or my other Instructables (this one shows how I make pan-fried potato cakes using instant mashed potatoes!). I have a couple that use green onions and I love these 5-shear scissors for quick prep!

Step 2: Place Them Roots Down in a Narrow Cup in 3/4 Inch of Water

Put the cup near a window with natural sunlight. Switch out the water every couple of days.

Step 3: Day Four of Growth

Step 4: Day Nine of Growth

Just snip the green ends when you need them for a recipe!

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48 Discussions

Awesome! I do excatly the same thing but with leeks.

I tried this before, but ended up with slimy and smelly onions. But I see you switched the water out every couple days!

I'll have to try again and do that. :)

2 replies

I've been doing this for about a year now, and the best method I've found is to use a small mason jar for about 5-7 stalks. You only need to put enough water in the jar to get the roots wet (so maybe 1/8-1/4 inch, max), as the rest of the plant above the root line doesn't do anything.

Instead of changing the water, I dump it out in the morning before I head to work, then add the above amount to the jar before I go to bed. There are two reasons for this:

1. The roots need time to breathe, as the plants themselves can't absorb that much water that fast when sitting on a window sill with limited sunlight (unless you have a grow light), which leads to the next point:
2. Submerging the roots in water constantly will eventually cause them to rot, and the onion will die.

I've learned this through experience, and I'm on my 4th generation of onions as a result.

I'd also like to point out that this is also feasible for other vegetables like lettuce, celery, cilantro, basil, and carrots.

I just last week planted my onion ends in a small pot of dirt on my window sill. They are growing nicely. I have a pair of those scissors. It never occurred to me to use them in the kitchen. Thanks for the idea.

6 replies

Just curious - What other use did you find for these scissors?

Doesn't it just come out in ribbons? I use my regular kitchen shears for pizza.
I, too, want to know where and how the five blade shears would be used if not in the kitchen.

Definitely not for pizza :) They can also be used for crafts for thin materials. You could cut fringe on cloth or use for extra detail on paper snowflakes. Other folding paper crafts too, like when you cut a paper heart or square by folding a piece of paper in half first.

The manufacturer called it a paper shredder. We make confetti.

They grow great in soil too, just easier in water! I love those scissors, makes it so easy to cut up green onions and herbs!

I have taken them and put them in the ground to grow onions faster than from a dry bulb.

1 reply

Hi Shari, thanks for sharing your Instructable. Any idea if it would work with green garlic too? I am crazy for green garlic, but it is hard to find it on the market...

4 replies

any member of the allium family, will work. leek, garlic, spring onion, scallion, shallot, chives, white, red, or yellow onion.


I'm going to do leeks FYI pan fried leeks are so tasty I use them to replace onions often.

Thanks Jimmie for your response on this. The green garlic will definitely regrow!