Learning how to regrow onions from store bought onions is one of the easiest ways to start gardening at home. You do not need seeds, special equipment, or a large garden. All you need is the bottom part of an onion, some water or soil, and a little patience. Many people throw away the onion root ends, but those root ends can actually grow into new onions.
Regrowing onions is a great way to save money, reduce food waste, and start learning how to grow your own food at home. Both red onions and white onions can be regrown using the same method.
Why Regrow Onions From Store Bought Onions
There are several reasons why people like to regrow onions from store bought onions. First, it saves money because you can grow more onions from the ones you already bought. Second, it reduces food waste because you are using a part of the onion that most people throw away. Third, it is very easy and a great project for beginners or even kids who want to learn about growing food.
Regrowing onions is also helpful if you want a small indoor garden or if you do not have space for a large outdoor garden.
Steps to Regrow Onions From Store Bought Onions
Step 1 – Cut the Onion Root End
The first step to regrow onions from store bought onions is to cut the bottom root end of the onion.
When cutting the onion:
- Leave about 1 inch from the bottom
- Make sure the root section is still attached
- Do not remove the root hairs
- Let the piece dry for a few hours before planting
This bottom section is the part that will grow new roots and eventually new onions.
Step 2 – Start Growing in Water
One of the easiest ways to regrow onions from store bought onions is to start them in water first.
Steps:
- Place the onion root end in a small bowl or cup
- Add a small amount of water
- The root should touch the water but the whole onion should not be underwater
- Put the bowl near a window with sunlight
- Change the water every 1–2 days
After a few days, you should see new green shoots growing from the top and roots growing from the bottom.
Step 3 – Plant the Onion in Soil
After the onion starts growing roots and green shoots, you can move it to soil.
Planting steps:
- Use a small pot with drainage holes
- Fill with potting soil
- Place the onion root end in the soil
- Cover the roots but leave the green shoots above the soil
- Water lightly
- Place near sunlight
The onion will continue growing and may produce multiple new onions from one root base.
How Long It Takes to Regrow Onions From Store Bought Onions
Many people want to know how long it takes to regrow onions from store bought onions. You will usually see green shoots within a few days, and the onion will continue growing over several weeks.
General timeline:
- 3–5 days → Roots start growing
- 5–10 days → Green shoots appear
- 2–3 weeks → Strong growth
- 1–2 months → New onions forming
- You can cut green onion tops anytime
You can also cut the green tops and use them like green onions while the onion continues to grow.
Tips to Successfully Regrow Onions From Store Bought Onions
Here are some helpful tips if you want to regrow onions successfully:
- Make sure the root end is not completely underwater
- Change water often
- Give the plant sunlight
- Do not overwater in soil
- Use pots with drainage holes
- Separate multiple onion shoots when they grow
- Plant outside if weather is warm
Onions are very easy plants to grow and are great for beginner gardeners.
You may also want to read our guide on How to https://everydayanswers.online/start-seeds-indoors-using-household-items/Start Seeds Indoors Using Items You Already Have at Home, since many vegetables can be regrown or grown from store bought produce.
For more information about growing onions and home gardening, you can visit the USDA gardening resources, which provide helpful information for growing vegetables at home.
Final Thoughts on Regrowing Onions
Learning how to regrow onions from store bought onions is a simple and useful skill that can help you start growing food at home. It saves money, reduces waste, and helps you learn basic gardening. Even if you only have a small space, you can grow onions in a pot near a window or on a balcony.
Once you learn how to regrow onions, you can also try regrowing other foods like lettuce, celery, green onions, and herbs.
Regrow Onions Questions People Often Ask (FAQ)
Can you regrow onions from store bought onions?
Yes, you can regrow onions using the bottom root section of store bought onions.
Do onions regrow better in water or soil?
They usually start in water and grow better long-term in soil.
How many onions can grow from one onion root?
Sometimes multiple onions can grow from one root base.
Can you grow onions indoors?
Yes, onions can grow indoors near a sunny window.
Can you cut the green onion tops while it grows?
Yes, you can cut the green tops and they will grow back.
Have You Ever Tried to Regrow Food at Home?
Have you ever tried to regrow onions or other vegetables from store bought food? Many foods like lettuce, celery, and green onions can regrow in water or soil. Trying to regrow food is a great way to start gardening at home and save money at the same time.