Onion Growing Stages
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Onion Growing Stages: Complete Guide & Care

If you’re passionate about growing vegetables in your garden or you own any form of house. And you are looking for how to grow onions safely and healthily and how many steps should be there to follow. Then you will get complete guidance about how you can grow onions step by step. In this article we will explain all Onion growing stages, complete criteria and basics. We will elaborate on common problems and their solutions as well.

Understanding the Basics of Onion Growing

Understanding the Basics of Onion Growing

Before we dive into the growing stages of onions, let’s discuss the basics of onion growing. Onions are a member of the Allium family as the Garlic and others, thy are grown for their flavorful bulbs. Onions are cool seasonal crops that are typically planted during the fall or spring.

Onion varieties can be classified into two categories  based on their response to daylight, namely long-day and short-day onions. The first variety requires as much as 15 or 16 hours of sunlight a day to fully bulb, and the second variety less than 13 hours. The type of onion you choose to grow will depend on your location and the time of year you plan to plant.

1.Seed Selection

Selecting the right seeds is crucial for a successful harvest. It is the first and very important phase in Onion growing stages. If you will be able to choose the best and quality seeds then almost half of your job will be done.

Before choosing your seeds, it’s important to consider the onion variety, as well as your location and climate. There are some popular onion varieties written below.

  • Red Burgundy
  • Yellow Sweet Spanish
  • Walla Walla
  • White Lisbon
  • Evergreen Bunching
  • Candy
  • Sierra Blanca
  • Red Zeppelin

Once you’ve chosen your variety, make sure to select seeds that are healthy and disease-free. You need to find out whether the seed is suitable for consumption or cultivation. So you have to judge by the appearance and color of the seed. Selecting onion seeds meticulously can enhance the likelihood of a productive harvest. See Also: Cucumber plant stages

2: Prepping the Ground for Planting

To cultivate robust onions, the initial step is to prepare the soil appropriately. It is as important for a plant’s health as the water for a fish. Onions require loose, well-draining soil with a pH between 6.0 and 7.0. The first step in preparing the soil for growing healthy onions is to clear the planting area of any weeds or debris. After this work is done, dig the soil well to a depth of 11 to 13 inches.

If you have access to compost or well-rotted manure, it’s best to amend the soil with them to provide the onions with vital nutrients. However, if you don’t have these materials available, you can try adding other organic matter such as grass clippings or shredded leaves to the soil. Also you can use proper fertilizer to improve the soil. Whatever you choose, make sure to mix it thoroughly with the soil before planting the onion sets. See Also: Garlic Growing Stages

3: Planting Onion Sets or Seeds

After finishing the soil preparation, it’s time to start planting either onion sets or seeds. Onion sets are essentially small and undeveloped onion bulbs. They are the easiest way to grow onions because they are easy to plant and produce onions quickly. Onion seeds can also be used, but they require more time, effort and attention.

But which one should you choose? Onion sets are the best option for beginners because they are less prone to disease and produce more consistent results. Seeds are also good for onion growing but onion sets are preferred by various experienced farmers.

4: Watering and Fertilizing

Once you’ve planted the onion sets or seeds, it’s crucial to maintain proper moisture levels in the soil to promote healthy growth. Onions require at least an inch of water each week, which can come from either rainfall or irrigation. However, it’s crucial to avoid overwatering the onions, as excess water can lead to stunted growth and rot, ultimately reducing the onions’ flavor. A useful tip is to water deeply once a week rather than giving shallow watering daily.

5: Controlling Weed and Insect Infestations

Onion growers often encounter challenges related to weed and pest management. Weeds can compete with the onions for water and nutrients, while pests can damage the onion bulbs. To prevent these issues, keep the planting area free of weeds and pests. Hand-weed around the onions, or use a hoe to remove weeds.

But what about pests? Onion maggots, trips, and onion trips can all damage onion bulbs. To prevent these pests, rotate your crops and use row covers to protect your onions from insects.

6: Harvesting and Storing Onions

Harvesting onions is quite a simple process. It is the very last phase of Onion growing stages. When the last branches or leaves of the onion plants turn yellow, understand that the crop is ripe. Be careful not to contaminate the wounds while removing them from the field. Afterward, remove any excess soil, trim the tops off, and let the onions dry further for a few more days before storing them.

Do not store the onions without drying or without cutting the tops.

To preserve onions for an extended period, it’s essential to store them in a well-ventilated, cool, and dry environment. The onions can last for several months with appropriate curing and storage. See Also: Lemon Tree Growth Stages

Common Problems and Solutions

Common Problems and Solutions

As with any crop, onion growing comes with many problems. Some of the issues are discussed below. If the plant gets infected with them, you can easily get rid of them.

Onion bulbs are small or not forming

This could be due to poor soil quality, poor seeds quality or not enough water. Check the soil pH and make sure the onions are getting enough water.

Assess the soil texture, and water the plant in the appropriate amount based on its needs۔ 

And keep an eye on the growing condition of all plants, from there you will be able to know about the quality of seeds or onion sets. See Also: Peperomia Obtusifolia Variegata

Onions are rotting

There can be two reasons for this, one is watering the plant in excess and the other is improper drainage. Don’t overwater because when it takes water in more quantity its roots start spreading.

Onions are turning soft or mushy

This could be due to storage issues. Keep in mind before storing Onions first lay them on any clean ground area to dry. And the second thing is to cut its top and remove excess soil before storing.


What is the preferable season for growing onions?

Earlier season of spring is the preferable season for growing onions.

How long does the onion crop need to mature?

It can be ready in 100 to 130 if the plant is properly cared for, and proper growth is observed.

Can you plant onions in the summer?

Onions are a cool-season crop and are best planted in the fall or spring. Planting onions in the summer may result in poor bulb development.

Can you grow onions in containers?

It is entirely feasible to cultivate onions in containers, provided that the container is deep enough, with a minimum depth of 12 inches, and has optimal drainage to avoid waterlogging.

How do you prevent onion maggots?

To prevent onion maggots, rotate your crops and use row covers to protect your onions from insects.

Can you eat green onions?

Yes, green onions can be eaten raw or cooked and are a great addition to salads, stir-fries, and soups.


Growing onions can be a rewarding and enjoyable experience. By following these steps, you can be able to produce healthy and flavorful onions that you can enjoy for months. Remember to choose the right onion variety for your location. prepare the soil, water and fertilize regularly, manage weeds and pests, and harvest and store your onions properly.

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