How Many Onions Grow From One Bulb

How Many Onions Grow From One Bulb? 2 Amazing Discoveries

Onions- These are vital in every recipe and can be grown in a garden in a modest amount of area. Because this crop may be preserved for several months, a home grower can become self-sufficient in onions. Not to mention they are high yield crops with little maintenance.

Onions can be produced from onion sets (small bulbs) or onion seeds, which each have their own set of benefits and drawbacks.

This post answers the question of how many onions grow from one bulb. A single Onion bulb or a single Onion seed will yield one Onion. Onion size varies based on variety and growing conditions.

Growing your own onions from seed is the most cost-effective option; a single packet of seed can frequently provide enough onions for the entire year.

How Many Onions Grow From One Bulb

pexels los muertos crew 10041313

Onions are robust plants with excellent yields that are used in a variety of dishes. As a result, they produce an excellent garden crop. Gaining knowledge on how many onions to expect while planting them in the garden is essential.

“How many onions grow from one bulb?” One onion bulb can only produce one onion. Onions and potatoes cannot be compared, however onion sets generate larger onions. As a result, you should plant one bulb for every onion you intend to harvest.

Although only one onion will grow from a single bulb, there are a few alternative techniques to acquire several onions from a single plant. It is disappointing learning that you can only grow one onion per bulb or seed (at a time).

If that’s the case, there are other ways you’re able to harvest multiple onions from one plant. Here are other plants you may want to consider growing:

  • Flowering Onions
  • Green Onions/scallions

#1 Green Onions

pexels alexandra kollstrem 9117894

First, let’s talk about green onions. Green onions are the green stems that grow above the onion bulb. Scallions are another name for these plants. You should expect anywhere from 3 to 10 scallions per onion bulb if each stem is counted as one scallion.

If you’re trying to produce green onions from an onion bulb, keep in mind that green onions are harvested much earlier than regular onions. Green onions can be collected when they are around 5 inches tall and at least 6 millimeters in diameter (The diameter of a pencil).

Harvest them as soon as the onion bulb begins to form. There are also some onion plant varieties that are grown exclusively for scallions. Welsh Onions are sometimes known as “Bunching Onions.”

They’re simple to grow because they simply need a little attention and can thrive in practically any soil type. As a result, they are ideal for inexperienced gardeners.

#2 Flowering Onions

allium g709b89147 640

If you leave onions in your garden for an extended period of time, they will ultimately bloom. These flowers would have spherical heads made up of little blooms. They can come in different colors like blue, pink, or violet, but they are commonly available in white color.

It is critical to harvest the seeds from these blossoms and plant additional onions at the proper time. Before the onion flower blooms, harvest the seeds. The flower will drop all of its seeds onto the ground once it has bloomed. 

Simply snip off the stems of any onion blooms that haven’t bloomed. After that, you should let the blossom dry. The bloom must be completely dried but not withered.

When the blossom has dried, you can harvest the onions by rubbing it between your hands. The bloom will lose its seeds, which you can keep for the next growing season. Remember that onion seeds have a one-year shelf life.

Also read: How To Cut Tree Limbs That Are Too High To Reach


It would take numerous seeds or sets to gather more onions when it comes to cultivating onions! One seed or bulb equals one onion, so plan appropriately as you prepare for the forthcoming growing season. Harvesting scallions and flowering onions are two options for getting the most out of your onion plants.

I hope this post has helped you understand how many onions can be obtained from a single onion bulb. Hopefully, my post has aided you in your efforts to plant your favourite crops. Best of luck!

Frequently Asked Questions

What is an Onion Set?

Onion sets are seedlings that have grown for a year to achieve maturity. It would take at least 5 months to grow onions from seed. Unfortunately, shorter growing seasons exist in some locations, making seed production difficult.

That’s where onion sets come in. Onion sets are little, pre-grown onions that are ready to grow and mature in a shorter amount of time. It takes 3 months for onions to mature, therefore if your growing season is less than 5 months, it’s best to start with sets.

Onions Vs Onion Sets

Onions are a biennial flowering plant that blooms every two years. They concentrate on building the bulb (onion) and a strong root system during the first year. They devote more work in the second year to creating the flower that will yield the onion seeds for the next generation.

As a result, when you plant onion sets, all you’re doing is replanting onions that were harvested early the previous year. As a result, the onion sets you planted in your yard will focus less on building the onion bulb and more on producing the flower.

Seed-starting onions is comparable to seed-starting a variety of other vegetables in your yard. Onion seeds, on the other hand, are started far earlier than most other vegetable seeds.

What is the best time to plant onions?

Onions are a tough plant that can grow at virtually any temperature. When it comes to nailing the onion planting schedule, the day duration for bulbing is the most critical factor to consider. Onions require a particular amount of hours of daylight during the growing season in order to create good bulbs.

This implies that even if your greenhouse stays at a balmy 80°F all winter, you won’t be able to produce bulbing onions in it unless you supplement with grow lights to get summer-like lighting hours. 

If the winter isn’t too harsh, onions can be grown during the winter. In a tiny space, roughly 40 onions per square foot can be cultivated. Allow the onions to grow to a respectable size by providing enough space for weeding during the growing season.

Leave a Comment

Your email address will not be published. Required fields are marked *