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Growing Onions in Florida: Tips and Tricks for a Bountiful Harvest

Onions are a staple in many dishes, and growing your own onions is a rewarding and cost-effective way to enjoy them. However, growing onions in Florida can be a bit challenging, as the warm and humid climate can lead to fungal diseases and insect pests. In this article, we’ll go over some tips and tricks for growing onions in Florida, so you can enjoy a bountiful harvest.

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Choosing the Right Variety

The first step in growing onions in Florida is choosing the right variety. Some onion varieties are better suited to warmer climates than others. Here are a few varieties that are known to do well in Florida:

  • Granex: This sweet onion variety is commonly grown in Vidalia, Georgia, but it also does well in Florida.
  • Texas 1015: This variety is known for its large size and sweet flavor, and it’s also heat-tolerant.
  • Red Burgundy: This red onion variety is known for its mild flavor and crisp texture, and it’s also heat-tolerant.

These are just a few examples of onion varieties that do well in Florida. Be sure to choose a variety that suits your taste preferences and the amount of space you have available.

Preparing the Soil

Once you’ve chosen your onion variety, the next step is to prepare the soil. Onions prefer well-draining soil with a pH between 6.0 and 7.0. If your soil is too acidic, you can add lime to raise the pH. If your soil is too alkaline, you can add sulfur to lower the pH.

It’s also important to add organic matter to the soil, such as compost or aged manure. This will improve the soil’s fertility and help retain moisture. Mix the organic matter into the top 6 inches of soil before planting.

Planting Onion Sets or Seeds

Onions can be grown from sets or seeds. Sets are small onion bulbs that have been grown the previous year, while seeds are, well, onion seeds. Sets are generally easier to grow and produce larger onions, but they are also more prone to disease. Seeds take longer to mature, but they are less prone to disease and can produce a wider variety of onion types.

If you choose to plant onion sets, plant them about 1 inch deep and 4-6 inches apart. If you’re planting seeds, plant them about ¼ inch deep and 1 inch apart. You can thin the seedlings to 4-6 inches apart once they’ve sprouted.

Watering and Fertilizing

Onions need consistent moisture to grow, but they don’t like to be waterlogged. Water deeply once a week, or more often if the soil is dry. Mulching around the onions can help retain moisture and suppress weeds.

Onions also need regular fertilization to grow well. You can use a balanced fertilizer, such as 10-10-10, or a fertilizer formulated specifically for onions. Apply the fertilizer every 4-6 weeks, following the package instructions.

Dealing with Pests and Diseases

Unfortunately, onions in Florida are prone to a variety of pests and diseases. Here are a few of the most common:

  • Thrips: These tiny insects can cause yellowing and distortion of the leaves. You can control thrips by spraying the onions with insecticidal soap or neem oil.
  • Onion maggots: These pests burrow into the bulbs, causing them to rot. You can prevent onion maggots by covering the onions with row covers or using a pesticide containing spinosad.
  • Fusarium rot: This fungal disease causes yellowing and wilting of the leaves, as well as rotting of the bulbs. You can prevent fusarium rot by planting disease-resistant varieties and practicing crop rotation.
  • Another important aspect of pest and disease management is early detection. Check your onions regularly for signs of pests or diseases, and act quickly to address any issues before they become severe.

Harvesting and Storing Onions in Florida: Tips and Tricks

Onions are a staple ingredient in many dishes, and growing your own onions in Florida can be a rewarding experience. When it comes to harvesting and storing onions in Florida, there are some tips and tricks that you need to keep in mind to ensure a bountiful and long-lasting harvest.

To harvest onions, wait until the leaves have turned brown and fallen over. This usually happens in the late spring or early summer, depending on when you planted them. Once the onions are ready to harvest, use a garden fork or spade to gently loosen the soil around the bulb. Be careful not to damage the bulb or cut the leaves off.

After harvesting, let the onions dry in the sun for a few days until the outer skin is papery and dry. Then, brush off any excess soil and trim the roots and tops. Store the onions in a cool, dry, and well-ventilated area, such as a garage or basement. You can store onions in mesh bags, baskets, or wooden crates. Avoid storing onions in plastic bags or containers, as this can cause them to rot.

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FAQs About Growing Onions in Florida

Here are some frequently asked questions about growing onions in Florida:

1. When is the best time to plant onions in Florida?

The best time to plant onions in Florida is in the fall, around October or November. This allows the onions to grow during the cooler months and mature before the hot and humid summer weather sets in.

2. Can I grow onions in containers?

Yes, you can grow onions in containers as long as the container is at least 8 inches deep and has drainage holes. Choose a variety that is suitable for container gardening, such as a smaller onion variety or a scallion variety. Be sure to provide consistent moisture and fertilization to the container-grown onions.

3. How can I prevent fungal diseases in my onion plants?

Fungal diseases can be prevented by practicing good sanitation and crop rotation. Avoid planting onions in the same spot for more than one year, and remove any plant debris from the garden bed. You can also apply a fungicide labeled for use on onions if necessary.

4. How do I know when my onions are ready to harvest?

Onions are ready to harvest when the tops have started to yellow and fall over. The bulbs should be firm and have a papery outer layer. Carefully dig up the bulbs and allow them to dry for a week or two before storing.


Growing onions in Florida may require a bit of extra attention, but it can be a rewarding experience. By choosing the right variety, preparing the soil, and providing consistent care, you can enjoy a bountiful harvest of delicious onions. Be sure to keep an eye out for pests and diseases and address any issues promptly. With a little patience and perseverance, you can become a successful onion grower in the Sunshine State!

About Author

Hannah Anderson is a passionate garden enthusiast with over a decade of experience. She has been sharing her knowledge and expertise on this website and her articles and tips have helped countless individuals create beautiful and thriving gardens. Whether you’re a seasoned green thumb or just starting out, Hannah’s practical advice and creative ideas will inspire and guide you on your gardening journey.

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