How To Grow Green Onions Starting Today: Everything You Need to Know

If you love fresh green onions, but don’t have the time to go to the store every week, then you should learn how to grow them yourself!

In this blog post, we will teach you everything you need to know about growing green onions, including:

  • Do green onions grow better in water or soil?
  • Can you grow green onions from store bought green onions?
  • How many times can you regrow green onions?
  • How long does it take for green onions to grow?
  • Do green onions need full sun?

By the end of this blog post, you will be an expert on regrowing green onions!

Now, let’s get started!

What are green onions?

how to grow green onions indoors

Green onions, also known as scallions or spring onions, or even salad onions, are a type of onion that is harvested before the bulb has fully developed. Green onions have a long white stem with a small bulb at the end. The entire onion is edible, both the white part and the green part.

Fresh green onions have a mild onion flavor more than other types of onions, which is why they are often used as a garnish or added to salads. In some cuisines, green onions are used as the main ingredient, such as in Chinese cooking for stir-fried dishes and more dishes.

Health benefits of green onion

Green onions are a good source of vitamins A and C and fiber. They also contain antioxidants and have anti-inflammatory properties. Additionally, green onions can help improve blood sugar control and protect against certain types of cancer.

Now that you know a little bit about them. Let’s learn how to grow green onions in water or in soil.

How to grow green onions Indoors in a container?

regrowing green onions

Spring onions are one of the easiest vegetables to grow. If you don’t have a lot of space, you can always grow a green onion plant indoors, then growing them in a container is a great option.

To regrow green onions in a container, fill your pot with well-draining soil and place the onion bulbs about an inch deep. Water the soil until it is moist, and place the pot in a sunny spot.

The size of the containers will depend on how many green onions you want to grow.

Green onions prefer well-drained, nutrient-rich soil that is slightly acidic (pH of around six). It’s best to use a potting mix specifically designed for growing green onions, or you can create your own mix by combining equal parts garden soil, compost, and peat moss.

When it comes to temperature, green onions prefer warmer climates and will grow best in temperatures between 60-75 degrees Fahrenheit (15-24 degrees Celsius). In colder climates, you can grow green onions indoors or in a greenhouse.

Finally, it’s important to fertilize your green onions with an all-purpose fertilizer every two weeks. This will give them the nutrients they need to grow fast and healthy.

How often should you water green onions?

Green onions do not require a lot of water. In fact, too much water can cause them to rot.

Green onions should be watered regularly to prevent them from drying out. We recommend watering them once or twice a week, depending on how dry your climate is.

If you live in an area with high humidity, you may need to water them more often. Conversely, if you live in an area with low humidity, you may need to water them less often.

The best way to tell if your green onion needs water is to stick your finger into the soil. If the soil feels dry, then it’s time to water it.

How long does it take for a green onion to grow?

Green onions grow pretty fast, probably among the fastest vegetables out there! This is really good news if you are impatient like me.

From start to finish, it will only take about two weeks for your green onions to grow. However, keep in mind that the actual time may vary depending on the type of onion you are growing and the conditions in your garden.

Here is a great video on how you can recycle a plastic bottle to grow green onions:

When to plant green onions?

You can plant green onions indoors or outdoors. So even if you live in an apartment, you can still regrow green onions!

If you are planting green onion bulbs, the best time to plant them is spring. If you are growing green onions indoors, you can do so any time of year. Just keep in mind that they will need a sunny spot.

When growing spring onions from seed, it’s best to start them indoors because they have a long germination period. Green onion seeds can take up to three weeks to germinate.

Once your green onion seedlings have grown to be about four inches tall, you can then transplant them outdoors, or if you live in an apartment, you can keep them in their pots.

How to grow green onions in water?

Green onions are one of the vegetables that you can grow in water vs soil regrowing green onions! All you need is a glass or jar and some water.

To grow green onions in water, cut off the root end of the onion and place it in a glass or jar of water. Make sure the root end is submerged in water and place the container in a sunny spot.

You should see new green shoots growing within a few days. Once the green onion gets about four inches tall, you can cut off the top and use it in cooking.

To keep your green onion growing, change the water every few days and add fresh water as needed.

You can also grow green onions hydroponically, but that is beyond the scope of this blog post.

Can you grow green onions from store bought green onions?

Another common question we get is whether you can grow young green onions from store bought green onions. The answer is yes!

One of the great things is that you can regrow green onions from the roots! So if you buy green onions from the store, don’t throw out the roots. You can use those to grow more green onions!

How many times can you regrow green onions?

You can actually regrow green onions an unlimited number of times!

Once you have cut off the root end of the onion, you can place it in a glass of water, and it will grow back. You can do this over and over again, and never have to buy green onions from the store again!

Do green onions need full sun?

do green onions need sun

Green onions actually prefer partial sun. This means that they should be planted in an area where they will receive some direct sunlight but also have some protection from the hot afternoon sun.

If you live in a climate with very hot summers, you may want to plant your green onions in a spot that gets morning sun and afternoon shade.

When and how to harvest the crop?

You will know when your green onions are ready to harvest when the greens are about six inches tall.

To harvest, simply cut the greens off at the base, being careful not to damage the roots. You can then replant the root end in a glass of water, and it will continue to grow!

What to do with green onions that have flowered?

When green onions flower, it means that they have reached the end of their life cycle and are no longer suitable for consumption. However, you can still use the flowers to produce seeds for future plantings. Here’s how:

  1. Allow the green onion plant to fully flower and form seed pods. The seed pods will be green and round, about the size of a pea.
  2. When the seed pods turn brown and dry out, carefully remove them from the plant and place them in a paper bag. Be sure to label the bag with the type of onion and the date harvested.
  3. Store the paper bag in a cool, dry place for a few weeks until the seed pods are fully dry.
  4. Once the seed pods are dry, shake the bag to release the seeds from the pods.
  5. Store the seeds in an airtight container in a cool, dry place until you’re ready to plant them.

Note: It’s important to note that when green onions flower, the flavor of the onion becomes much stronger and is not suitable for eating raw. However, the flowers can still be used as a garnish or added to salads for their visual appeal.

Do green onions multiply?

No, green onions do not multiply. However, you can regrow green onions unlimited times from just one green onion!

There is a particular type of onion called a multiplier onion, but it is not the same as a green onion. Multiplier onions will multiply in your garden, but they are not the same thing as green onions.


If your traditional green onions are not growing, you should check the following:

1. Are they getting enough sun

You should first check the amount of sunlight they are getting. Green onions need at least six hours of sunlight per day to grow properly. The signs of a green onion that’s not getting enough sun are small, pale greens.

If you find that your green onion is not getting enough sun, try moving it to a brighter spot. You may need to supplement with artificial light if you can’t move it.

2. Check the soil

If your green onion plants are getting enough sun, the next thing to check is the soil. Keep the soil moist but not waterlogged. If the soil is too dry, it will cause the plants to wilt. If the soil is too wet, it will cause the roots to rot.

To fix this, simply adjust your watering schedule accordingly

3. Pests

Green onions are relatively resistant to pests and diseases, but there are a few things to watch out for.

The most common pest is the onion fly. These flies lay their eggs on the leaves of the onion plant. When the eggs hatch, the larvae burrow into the bulb of the onion and eat it from the inside out.

To prevent this, you should use row covers or floating row covers to keep the flies off your plants.

4. Disease

The most common disease is white rot. This disease affects both the roots and leaves of the onion plant. The leaves will turn yellow and then brown and, eventually, die. The roots will also become soft and mushy.

To prevent this, you should water your plants at the base of the plant rather than from above. This will help to keep the leaves dry and prevent the disease from spreading.

If you notice any pests or diseases on your plants, you should remove them immediately and dispose of them properly.

Recipe: Green onion and sesame sauce

Preparation time: 10 minutes

One of my favorite recipes is this green onion and sesame sauce. I use it on everything from chicken to rice to sandwiches.

Ingredients for green onion and sesame sauce:

  • 5 Green onion stalks
  • Parsley leaves – 1 cup (coarsely chopped)
  • Rice vinegar – ¼ a cup
  • Olive oil – 2 tablespoons
  • Roasted sesame oil – 1 tablespoon
  • Honey – 1 tablespoon
  • 1 Serrano pepper (finely chopped – Can be replaced with another hot green pepper)


  1. Mix green onions, parsley, vinegar, vegetable oil, sesame oil, and honey in a blender until a smooth and uniform mixture is obtained.
  2. Add half the amount of the Serrano pepper and mix again; Add a teaspoon of water if the sauce is too thick.
  3. Taste the sauce and add Serrano pepper to the desired degree of spiciness, season with salt and keep in the refrigerator until 3 days of use from the moment of preparation.
  4. If you would like to keep the sauce much longer, you can way more olive oil.
  5. Enjoy 🙂


We hope you have enjoyed learning everything there is to know about how to grow green onions! Be sure to try it out for yourself and see how easy and fun it is. And don’t forget to share this article with your gardening friends! Thanks for reading!

Photo of author
Daniel Buckner is an indoor gardening enthusiast and hydroponic expert with years of experience cultivating a variety of plants. Passionate about sustainable living and urban gardening, Daniel shares his knowledge through engaging content to inspire and educate fellow gardeners. Discover the joys of indoor gardening with Daniel's practical tips and valuable insights.

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