How to Grow Onions in Containers: 6 Easy Steps

Want to grow onions in a tight space? Learn how to grow onions in a pot and valuable tips to ensure your onions grow healthy just like in a spacious garden.

Sean Stratton | Updated January 3, 2023
onions in a pot

Onions are demanding and versatile vegetables.

And you don’t need a lot of space to grow them. You can grow onions in a pot.

1. Choose an appropriate container

Select a large-mouthed pot or container with 6-8 inches of depth. Consider using a pot that offers you a good drainage system.

2. Prepare the container

You need fertile soil that is loamy and enriched in organic materials to prepare the pot. Sandy loam is the best type for your onion cultivation. Add a small amount of well-rotted fertilizer or compost and sand to the potting soil.

3. Choose an Area for your container

Once your container is ready to cultivate onions, it’s essential to choose a location with full sunlight to grow quickly. Onions require at least 6-7 hours of sunlight a day. If you plant indoors or in a place that doesn’t get adequate light, make sure onions get enough light with artificial lights.

4. Plant the onions

Sow seeds indoors for 6-8 weeks to get mature seedlings. However, you can plant seeds directly in your pot. You can purchase onion seedlings from the nursery. Plant onions in a way that are 1-2 inches apart from each other, and their roots go at least 1-2 inches deep.

5. Water your onions regularly

While growing onions in a pot, watering is necessary. The potting soil will dry out faster and can lose moisture quickly. Keep watering once a week.

6. Fertilize your onions

Give your onions fertilizer to get a healthy harvest. Avoid using a fertilizer that is rich in nitrogen. It can harm your plants. Apply fertilizer once every 3-4 weeks.

Here are Top Fertilizers for Onions Reviews

Can You Grow Onions in a Pot?

Yes, you can. In fact, this is one of the best ways to grow onions. Their roots don’t take too much place for collect nutrients. So, you can easily grow them indoors or outdoors in a pot. Pay heed to maintain the soil quality, watering, well drainage system, and supply enough fertilizer. Try to choose an area with sufficient sunlight to place the pots or containers.

Can You Grow Green Onions in a Pot?

Yes, growing green onions in a pot will be a pretty enjoyable experience. You don’t need to be an expert gardener to cultivate them. Find a pot that you can make well drainage system. Keep in mind that green onion plants dry out quickly because they don’t have deep roots. So, keep the soil moist. Supply water as much as needed to keep soil moisture.

Tips to Follow for Pots or Container Onions

Do you want to get fresh and healthy onions supply from your pots or container gardening? Follow a few tips and tricks to get plentiful healthy onions. Have a look –

  • Select an area to place the pot where your plant gets enough sunlight. They require a minimum of 6-7 hours of light per day. If you want to plant indoors and the sunlight is insufficient, arrange artificial light to supply adequate light.
  • Pick a pot or container that is large-mouthed and that can provide you with a good drainage system. Make at least 2-3 holes in the container to drain the water.
  • The container should be 8 inches deep. It performs well to plant enough onions.
  • While you’re preparing your pot, choose the right soil. Sandy loam is the ideal type of soil for growing healthy onion plants quickly.
  • Onions are sensitive to daylight. Different type of onions needs different length of daylight. Choose a planting time and place according to the onions variety that you want to grow.
  • Don’t get your potting soil dry. Water your plants at least once a week to keep the soil moisture. Avoid over-watering. It can cause harm to your onion plants. Remember to check the soil regularly.
  • When plants start to grow, cover the onion bulbs with organic mulch, such as decaying leaves, straw, or compost. It can help to keep soil wet and prevent unwanted plants around the shallow roots.
  • Onion plants need fertilizer for proper growth. So after planting, give them a nitrogen fertilizer. Try to avoid applying a high level of nitrogen fertilizer. You can feed them with any balanced liquid fertilizer. Stop fertilizing when the bulbing process is started.
  • Pests are common for any plants. To control the pests, apply Neem oil spray or other insecticidal soap. You can also use floating row cover cloth to protect the plants. Never cover emerging onions.
  • Consider to apply organic fungicide to get rid of fungal diseases.

Final Thoughts

Growing onions in a pot or container are not just an easy way; it’s a fun and enjoyable growing experience. Don’t miss this beautiful experience due to some unwanted problem. Give a little bit of effort and enjoy a flavorful healthy onion harvest. Feel free to share your onion growing experience. We would love to hear from you.

Written by Sean Stratton

Sean Stratton

Hi, I'm Sean, the senior editor here at Fertilizer Pick. I grew up on a farm in North Carolina and have grown fruits, vegetables, and trees since childhood. While I no longer live on a farm today, I still enjoy spending time on my garden and sharing my knowledge with friends and fellow garden enthusiasts.