How To Grow Green Onions In Water

The green onion—also called scallions or spring onions—is a vital and incredibly healthful part of any diet. They can be planted year after year because they are perennial plants.

Many essential elements for human health are present in them. The entire spring onion is delicious and nutritious.

This plant’s versatility means you can use it in both cooked and raw forms. This is practically the most important component of Chinese cooking.

In addition to being a rich resource for flavor enhancers, it also provides vital nutrients, including enzymes, sulfur compounds, and flavonoids that strengthen our defenses.

Their therapeutic properties destroy the cancer-causing cells they contain. In addition to warding off the common cold and preventing diabetes, the sulfide content of these foods also serves to limit the creation of the insulin that contributes to these diseases.

How to grow your green onions in water

  • Gather a handful of green onions, then trim the green parts off a few inches above the roots so you are left with just the white section of the onion.
  • The second step is to get some clean water and put it in a container. The remaining portion of the root you set aside can be thrown into the water. Make sure you submerge the roots, but the tops of the edges are above the water.
  • Place them in a bright window where they can get some sunlight but not too much, and make sure the soil stays humid.
  • You’ll see that they sprout new leaves and expand rapidly.
  • Keep the water fresh by periodically replacing it. It’s fine to do this every few days.
  • It’s normal for plants to get sticky as they mature; to remedy this, simply peel off the slimy area with care so as not to harm the plant.

After some time, you’ll see that the green onions have returned to the size they were before you planted them.

Now is the time to collect the leaves for use in cooking by cutting them gently to the ground. When you see that your plants are getting too big, you can either let them grow until you get tired of cutting them back or start over.

How many times can you regrow green onions in water?

You can green onion plants around 6 times before the plant begins to die off. This means that after every 3 weeks of harvesting the onion, a fresh one will be ready for use again.

To accomplish this, provide a warm, wet environment for the roots. You can even just put the bulb’s top end into a glass of water and expose the root to natural light.

Simply snip off the green onion’s top and submerge it in water to regrow the plant. If you’re watering with tap water, swap it out each day or two to avoid introducing bacteria to the plant’s roots.

Keep the green onion’s roots moist and place them in a spot where they will receive indirect sunlight. In about 2 to 3 weeks, the top of your onion will begin to sprout little white shoots called “sets.”

They can be planted immediately. Plant the shoots at a depth of at least 1 inch in well-drained soil that is moist but not soggy.

The key is to water the roots regularly and prune them (but not too much). A white base can be seen at the top of the root when the onion is initially cut.

There, growth will resume. Be careful not to shorten it too much. Maintaining them in the water allows them to take in more moisture and nutrients than they would if allowed to grow on soil.

The length of their leaves and their growth rate will indicate when they are ready for planting.

Is it better to regrow green onions in water or soil?

Water vs. Soil

There is no single best way to grow onions. Growing them in water may be simpler for some, while others choose soil. Each approach has its advantages and disadvantages.


Onions are slightly simpler to row in water than in soil. You can use a more basic container, like a vase jar, and water them less frequently. Onions grown in water can weaken if they aren’t given enough salt when cooked.


Traditionally, onions have been grown in soil. It’s a bit more work; however, most people say the onions are worth it for the improved flavor.

Growing onions in soil requires consistent watering and fertilization. This will provide the plants with the nutrients they require for optimal growth.

Which is better?

Green onions may be regrown in the water quite quickly and easily. The roots are visible as the plant grows, making this an enjoyable activity for kids of all ages.

The soil method requires a little more time and effort, but the benefits of planting in the sun and in nutrient-rich soil are well worth it.

Regarding the optimal conditions for growing onions, there is no definitive solution. This is entirely subjective. While onions grown on soil taste better, some gardeners find scallions grown in water easier to maintain.

How long does it take to regrow green onions in water?

In approximately a week, new stalks will emerge from the green onion bulbs. If you leave the bulbs in the ground and provide them with consistent water, they will keep producing new onions. You can obtain 3 or 4 harvests out of a single planting of bulbs.

Where to cut green onions to regrow?

Remove 2 to 3 centimeters of the onions’ roots. Put the stems to good use in your dish, then plant the root cuttings in bare soil. It’s best to plant the roots in the ground while leaving some stems above ground.

Grow it with consistent watering. When they reach maturity, you can cut them off at the base and use them as you see fit.

If you leave the roots in the ground, they will sprout another 4 times before you start over. One of the green onions can be allowed to mature, bloom and set seed.

If you don’t have any soil, you can also grow them in water.

Cut off 2 to 3 centimeters of the spring onions’ roots. Keep the cutting’s root end in water in a tiny jar.

Place it on a balcony or a sunny window sill. Roots should always stay in the water, and you should make sure you change the water weekly.

The benefit of re-growing green onions

Re-growing these onions from seed is a simple and enjoyable gardening hobby that you can do in the water.

Many advantages exist to doing so.

  • Because it is not rooted in the ground, cleanup is a breeze.
  • As long as a glass jar is available, you can grow it indoors in almost any location.
  • Maintain ready access to a supply of fresh green onions at all times.
  • Easy-to-maintain indoor garden.
  • Spend less money. Naturally, it’s the most essential one. You can add it to your shopping list once and then grow it again and again in soil or water in a pot.

Additional tips

Green onions are relatively pest-free. Root the cuttings in water or soil indoors, and transplant the young plants once they have reached a height of at least six inches.


Green onions are easy to cultivate because you can grow and use them soon after purchase. The bulbous white bulbous base can be maintained with some greenery clinging to the roots.

If you order new shoots, they should be ready for pickup within 60–80 days. Keep your crops warm and dry to avoid damage from frost.