Do onions grow in the ground or above?

Onions grow in the ground. Onion tops grow above ground, while the onion bulb develops underneath.

Red and yellow onions are harvested by gardeners for their subterranean bulbs. On the other hand, green onions are harvested for their above-ground stalks.

The veggie onion is consumed all around the globe! It is a staple in most houses and used in practically all types of cookery.

We are all familiar with the word, but sometimes you could wonder how and where onions grow. Onions are often questioned as to whether they constitute a root vegetable or a food that is cultivated above ground.

Onions and garlic grow underground just like potatoes.

A vegetable species of the genus Allium, the onion is a biennial that needs two seasons to complete its life cycle.

Why do onions grow underground?

Do onions grow in the ground or above

Onions grow underground because they are root vegetables. They need to have a proper connection with the ground to grow properly. They will not grow well if they do not get sufficient ground depth.

Do all onions grow underground?

Yes, all onions grow underground.

Here are some onion varieties:

Sweet Onions– They have a moderate taste, yet under ideal circumstances, they may yield 2-pound bulbs!

Welsh Onions: In comparison to other onions, this kind needs a little bit more room to flourish. Moreover, they feature thicker stems rather than plump bulbs.

Yellow Onions: This particular onion may be present in any kitchen. They have a brown color and are widely accessible. This kind of onion works well in many different cuisines!

Spanish Onions: In addition to being larger than a yellow onion, this kind also has a milder taste. Despite the fact that many people mistake yellow onions for Spanish onions, the two are distinct and taste very different.

Bermuda Onions: The Bermuda onion kind of onion is bigger and lighter in color than a yellow onion. When combined with other dishes, their sweet taste improves the flavor of those other items.

Do onions have seeds?

Yes, onions have seeds. An onion would grow a blossom like this in the second year if you did not pick it but instead left it in the ground.

onion Seed Heads

When this bloom matured, little dark brown to black seeds with the aforementioned appearance would be produced.

Onion Seeds

If you’ve planted onion sets, which are technically the bulb of first-year plants and are what most gardeners refer to as “sets,” your plants will bloom during the same growing season.

How to grow onions underground?

Onions are one of the easiest vegetables to cultivate because of their exceptional cold and drought tolerance. The seeds can be started in seed trays or sown straight into the ground.

They germinate swiftly. Also, they have a huge planting window, and seedlings can endure being kept in trays for a long time.

They are also quite flexible when it comes to harvesting since they may be taken almost at any point in their life cycle, even after the plant has entirely died back. If the weather is not too dreary, they will even spend a lot of time sitting in your garden. The onions will ultimately perish under wet circumstances.

Everything you plant will probably end up in your stomach at some time since onions are so simple to preserve for later in the year.

Since onions are robust, frost-tolerant plants that can withstand temperatures as low as -6°C (20°F), they have a broad planting window. While onions can be produced from either seeds or sets (small bulbs), I usually advise starting them from seeds.

However, it depends on the environment where you live, late winter to early spring is the optimum time to sow seeds. It is feasible to sow onion seeds in the fall in regions with warmer winters, but doing so will only speed up your harvest by a few weeks rather than many months.

While onion seeds may be planted directly in the ground in a garden, I advise starting onions in modular trays since this gives you more control over the growth environment and frees up garden space for other winter crops.

Why Are My Onions Growing out of the Ground

It’s really a positive indicator if your onions growing out of the ground. As onions become mature they pop out of the ground. To lessen the possibility of rotting, do not cover them while they do this.

Can You Grow Onions From An Onion

can you grow onions from an onion

So you should grow an onion from an onion if you want to observe the development of your multiplying in no time! The onion just has to be cut in half and planted in the ground.

With little more than your onion’s cuttings, you can cultivate onions. An onion may be grown from an onion, but it will take between 90 and 120 days.

Let’s look at the detailed instructions for doing it!

  • After removing the onion’s outer layer and bottom, chop it to around 1 inch.
  • You should chop an onion approximately 2.5 inches long if you want it to be nutritious.
  • Any store-bought onion will do for this, although a fresh onion is preferable.
  • Then, let the onion dry for 24 hours after cutting it.
  • Retain the side you just divided in half, and set it down on a level surface.
  • To form an “X” on the onion, you will now need four toothpicks. Place one on each side of the onion.
  • Put some water in a small bowl and set it down on a level surface.
  • Now position the onion in the basin so that its base just touches the water.
  • Give it three to four days.

How Many Onions Will One Onion Grow

Onion comes in a wide range of variations. Yet if you use the common variety, an onion will only produce one onion. The potato onion, on the other hand, may produce around 5 onions per plant.

The good news is that a sprouting onion may be used to produce other onions. Hence, you may utilize one onion that has sprouted and been collected and preserved for a while to produce other onions.

How much time do onions take to grow?

While onions may be picked and consumed at any time, it usually takes them 6 to 8 months to achieve full maturity. When onions are at this stage, they may be safely preserved for a long time.

Can onions grow in pots?

can onions grow in pots

Yes, you can grow onions in pots.

In the spring or when the soil temperature in your growing zone reaches at least 60 degrees, onions should be planted in pots. It should be noted that onions may be planted in the autumn for early summer harvest in the southern part of the nation where winters are mild.

You may opt to produce your own onions from seed, onion sets, or baby onion bulbs. Onions grown from seed, however, need to be planted inside approximately eight weeks before to the latest frost date in your region.

You may even plant organic onions that may have sprouted before you had a chance to consume them at the grocery store or farmer’s market.

Peel back the outer layers of an onion until you reach the center sprouts before planting (there may be one or more). Plant the sprouts after separating them from the onion sets.

Choose the Correct Onions

Before planting, you should decide which onion variety is appropriate for your growing zone. Onions are sensitive to the quantity of light they get daily, and unless certain parameters are reached, they won’t begin to produce bulbs.

Long-day onions, like Walla Wallas, have been developed to thrive in the northern region of the United States and need 14 to 16 hours of sunshine each day. Onions with short days, like White Bermuda, need just 10 to 12 hours each day and are best planted in the south of the nation.

In the center are day-neutral onion cultivars like Candy, which have been developed to thrive with 12 to 14 hours of direct sunshine daily. If you are in the center of the nation, close to growth zones 5 or 6, plant them.

How to grow Onions in pots?

  • 1. Fill the pots with soil so that the soil level is approximately an inch below the top edge of the container. Fill the containers with a combination of two-thirds potting soil and one-third organic compost.
  • 2. Plant onions in containers. For each onion, you want to plant, dig a little hole in the ground two to three inches deep with your finger. Four to five inches should separate them. Put one onion in each hole, root end down, and then gently press the earth around each one to hold it in place.
  • 3. Care for your onion plants. Deeply wet the soil until it is well soaked and water begins to leak from the container’s bottom openings. Put the containers in a location outside that receives direct sun.

In order to avoid root rot, keep an eye on the soil moisture in the pots and water the plants when the top inch or two of the soil has dried up. After a month or two, you may give the plants a little amount of organic fertilizer. In the containers, get rid of any weeds that could sprout.

Can I grow onion above the ground?

No, you cannot grow onion above the ground because onion tops grow above ground, while the onion bulb develops underneath.

How to harvest onions

You can harvest onions after the tops have fallen off and the bulbs are large and solid.

Trim the tops off an inch or so above the bulb, and then use a fork to carefully remove the dirt around the onion. To avoid damaging the skin, carefully take the onion out of the ground.

After harvesting your onions, clean off any dirt and let them air dry for a few hours in a cool, dark location. When they have dried, you can either cut them into pieces or keep them whole.

How to store onions

The easiest method to store entire onions is to put them in a mesh bag in a cold, dry location. The optimum location is a root cellar or basement, although a cool closet can do.

Let the air flow around the bag of onions while they are hanging in a cool, dry location.

Onions may be frozen or kept in a closed container in the refrigerator if they are being stored in bits. If you’re not going to use the cut onions right away, freezing them is the best choice since they won’t keep very long in the refrigerator.

Onions may be frozen by being cut into the proper size and spread out on a baking sheet. The onions should completely freeze on the baking sheet after being placed in the freezer.

You may move them to a freezer bag or container once they have frozen. Onions that have been frozen may last up to six months.


Every family needs onions, and they are also incredibly simple to cultivate! Thus, if you were wondering if onions grow underground or not, you now know the answer!

Before you go, I urge you to read the following articles that are linked to gardening in order to assist you with additional gardening-related problems:

How to grow chives in a pot

Resource: Get busy Gardening: Growing Onions