Growing Onions in Florida: Tips and Tricks

Understanding the Florida Climate for Growing Onions

Florida Climate for Growing Onions

Onions make for a delicious and healthy addition to numerous dishes. With a little effort and the right conditions, growing onions in Florida can be done successfully. While it may seem like an unusual choice for a Floridian garden, it’s worth noting that onions can grow all year long with the right conditions. Here’s what you need to know about the Florida climate for growing onions.

The climate in Florida can vary depending on the region. In general, Florida has a humid subtropical climate with hot and humid summers and mild winters. The temperature, rainfall levels, and humidity levels can all play a role in the success of your onion crop. By paying attention to these factors, you can provide the optimal growing conditions for your onions.

The optimal temperature range for growing onions is between 60°F and 75°F. Although Florida has warmer temperatures, it’s still possible to grow onions if you choose the right time of year. You can plant your onion seeds or seedlings during the cooler months from October to January when the temperatures are cooler and the days are shorter.

Additionally, onions require a specific amount of water depending on their growth stage. It’s important not to overwater onions as they can easily rot in excessively wet soil. In dry seasons, it’s recommended to water them twice a week, but in rainy seasons, you may not need to water them as frequently. Be sure to test the moisture in the soil frequently to ensure that the onions are receiving the correct amount of water.

Florida’s soil and pH levels can vary from region to region. Onions grow best in well-draining soil with a pH level between 6.0 and 7.0. If your soil is too acidic, add some agricultural lime to adjust the pH levels. On the other hand, if your soil is too alkaline, you can add some sulfur to the soil. It’s crucial to prepare the soil before planting the onion seeds or seedlings. The soil should be loose and free of any debris or rocks, and it’s a good idea to add some compost or organic fertilizer to help provide the necessary nutrients for proper growth.

In conclusion, growing onions in Florida can be done successfully by following the tips above. By understanding the climate and taking the necessary steps, you can have a bountiful onion crop all year long. Aside from being a tasty addition to your meals, growing onions from your garden can be a satisfying and rewarding experience.

Choosing the Right Onion Varieties for Florida

onion varieties for florida

Onions are a versatile and essential ingredient in many dishes. They can be grown in various parts of the world, including Florida. However, it’s important to choose the right onion varieties that are suitable for the state’s growing conditions. The following are some of the best onion varieties for Florida:

Short-day Onions

short day onions

Short-day onions are the best variety to grow in Florida. They require 10-12 hours of daylight to form bulbs, which makes them ideal for areas with a lot of sunlight. These onions have a mild flavor and are perfect for adding to salads and soups. Some popular short-day onion varieties include Texas Grano, Burgundy, and Yellow Granex.

Sweet Onions

sweet onions

Sweet onions are another excellent choice for growing in Florida. These onions are popular for their mild, sweet taste, and can be eaten raw or cooked. Some of the best sweet onion varieties include Vidalia, Walla Walla, Maui, and Texas Spring Sweet. However, it’s important to note that sweet onions are not as tolerant of Florida’s heat and humidity as short-day onions.

Intermediate-day Onions

intermediate day onions

Intermediate-day onions can also be grown in Florida, but they require a longer day period than short-day onions. These onions have a slightly stronger flavor than short-day onions, and their bulbs can store for up to six months. Some popular intermediate-day onions include Red Creole, Candy, and Super Star.

Day-neutral Onions

day neutral onions

Day-neutral onions are a relatively new variety that can be grown in Florida. These onions do not require a specific amount of daylight to form bulbs, making them ideal for areas with inconsistent or shorter daylight periods. Some popular day-neutral onion varieties include Texas Legend, Sierra Blanca, and White Bermuda.

When choosing onion varieties to grow in Florida, it’s important to consider factors such as the climate, soil quality, and the length of daylight periods. It’s also essential to choose onion bulbs that are suited to the state’s warm and humid conditions.

Florida gardeners should start planting onions in late fall or early winter and harvest them in late spring or early summer. Onions can be planted in raised beds or containers and should be kept well-watered and fertilized. With the right onion varieties and proper growing conditions, Floridians can enjoy fresh, flavorful onions in their recipes throughout the year.

Preparing Your Soil for Onion Planting in Florida

onion soil preparation florida

Planting onion in Florida is not only possible but also very rewarding. Many people don’t realize that soil preparation plays an essential role in producing healthy onions. Florida soils are typically sandy and lack organic matter. Therefore, before planting onions in Florida, it’s crucial to prepare your soil adequately. In this article, we’ll provide a few tips to help you prepare your soil for onion planting in Florida.

1) Determine Your Soil Type

soil type

The first step in preparing your soil for onion planting in Florida is to determine your soil type. Florida soils are usually sandy, but this may vary depending on the region. Knowing your soil type will help you determine the appropriate amendments to add to your soil.

2) Improve Soil Drainage

soil drainage

Onions require well-drained soil to thrive. In Florida, sandy soil drains quickly, but it’s not necessarily well-drained. You can improve soil drainage by adding organic matter, such as compost or aged manure. Organic matter improves soil structure, allowing for better water infiltration and retention, and promotes soil microbial activity.

3) Adjust Soil pH

soil ph

The pH of your soil can affect onion growth and development. The ideal pH range for onions is between 6.0 and 7.0. Florida soils are typically acidic, with a pH range of 5.0 to 6.0. You can buy a soil testing kit from your local garden center or county extension office, or send a soil sample to a soil testing lab to determine the pH of your soil. To increase soil pH, add ground limestone or dolomite lime to your soil. To decrease soil pH, add elemental sulfur or aluminum sulfate to your soil.

It’s important to note that amending soil pH takes time, so it’s best to do it several months before planting onions.

4) Fertilize Your Soil


Onions are heavy feeders, so fertilizing your soil is vital to producing healthy onions. Add a balanced fertilizer or a blend of nitrogen, phosphorus, and potassium to your soil to provide the necessary nutrients. You can also add bone meal, fish emulsion, or blood meal to your soil to improve fertility. Follow the recommended application rates on the fertilizer package or consult a local expert for advice on fertilizing onions in Florida.

5) Mulch Your Soil


Mulching your soil can help conserve moisture, suppress weed growth, and regulate soil temperature. Add a layer of organic mulch, such as straw, dried leaves, or grass clippings, to your soil after planting onions. Avoid using plastic mulch in Florida, as it can increase soil temperature and promote fungal and bacterial diseases.

In conclusion, preparing your soil for onion planting in Florida takes some effort, but it’s well worth the results. Taking the time to add organic matter, adjust soil pH, fertilize, and mulch your soil will provide your onions with the best growing conditions and ensure a bountiful harvest.

Planting and Caring for Onions in Florida

Onions in Florida

If you are looking to grow onions in Florida, there are a few things to keep in mind. Onions are a crop that require well-drained soil, full sun, and consistent moisture. It’s important to choose the right type of onion for Florida’s warm climate and to properly care for your plants throughout the growing season.

1. Choosing the Right Onion Varieties

When selecting which type of onion to plant in Florida, it’s important to choose varieties that are well-suited to the warm climate and shorter growing season. Short-day onions are the best choice for Florida growers because they require less daylight to mature. These onions typically take around 110-130 days to mature and produce smaller bulbs than long-day onions. Varieties to consider include Southern Belle and Granex 33.

2. Preparing the Soil

Onions need well-draining soil with a pH between 6.0 and 6.8. If necessary, add organic matter such as compost or aged manure to your soil to improve its texture and fertility. It’s important to avoid soil that has high clay content, as onions do not grow well in heavy soils that hold moisture. In addition, onions prefer soil that has been deeply tilled to a depth of at least 12 inches to allow ample root penetration.

3. Planting Onions

Plant your onion sets in the fall or early winter, when temperatures have cooled to around 60°F – 65°F. It’s important to plant your onions in a location with full sun exposure, as this will help the bulbs to mature properly and achieve their full flavor. Plant sets about 1 inch deep, 4 inches apart, in rows that are 12-18 inches apart. Onions grow best in loose, friable soil, so be sure to use a hoe or cultivator to loosen the soil around your plants, being careful not to damage the delicate roots.

4. Caring for Onions

Caring for Onions

One of the most important things to keep in mind when caring for onions is to keep the soil consistently moist. Onions need plenty of water to grow properly, but it’s important not to overwater them as this can lead to rot. To ensure that your onions receive adequate moisture, water deeply once or twice a week, depending on weather conditions. It’s also important to weed around your onion plants regularly to prevent competition for nutrients and space.

Fertilize your onions with a balanced fertilizer that’s high in nitrogen. It’s best to apply a light application of fertilizer every three weeks throughout the growing season. Be sure to avoid fertilizers that are high in potassium or phosphorus, as these can delay the growth of your onions.

If you’re growing short-day onion varieties, they will typically begin to mature in early to mid-spring. When the onion tops start to yellow and fall over, it’s time to harvest your bulbs. Pull the onions up and let them dry in the sun for a few days before storing them in a cool, dry location.


Growing onions in Florida is a rewarding and satisfying experience. With the right care and attention, you can enjoy a steady supply of flavorful onions throughout the year. Remember to choose the right varieties, prepare your soil properly, plant your onions with care, and provide them with consistent watering and fertilization. With these simple steps, you’ll be well on your way to growing a bountiful crop of onions.

Harvesting and Storing Onions in Florida

Harvesting and Storing Onions in Florida

Onions are a staple crop for any garden, and Florida’s warm climate offers unique opportunities for onion growth. If you’re thinking about cultivating onions in your Florida garden, it’s essential to understand when and how to harvest the bulbs and how to store them. Here’s what you need to know to successfully harvest and store onions in Florida:

1. Know When to Harvest

Onion Harvesting Time

When your onions start to form bulbs, it’s time to pay attention. You can tell when the bulbs are ready to harvest because the tops of the plants will start to turn brown and dry out. Once the tops have dried out, use a garden fork to gently lift out the onions, being careful not to damage them in the process.

2. Cure Your Onions

Curing Onions

Curing onions involves drying them out to prepare them for storage. After harvesting, take your onions and spread them out in a warm, dry place with good ventilation. Allow the onions to dry out completely, which can take up to two weeks. During the curing process, the skins will become papery, and the tops will shrivel up and detach from the bulbs.

3. Trim Your Onions

Trimming Onions

After curing, you’ll want to trim your onions for storage. Cut off the roots and remove any remaining tops, leaving about one inch of stem remaining. You’ll also want to remove any damaged or diseased layers of skin. That way, you can ensure that your onions will store well without contaminating one another.

4. Store Your Onions Properly

Storing Onions

Once you’ve cured and trimmed your onions, you’re ready to store them. Ideally, you’ll want to keep them in a cool, dry place with good ventilation. The best storage location is a mesh bag or a cardboard box with small air vents. You can also keep them in a root cellar or a cool garage. If you store your onions in a humid location, the moisture can cause them to spoil quickly.

5. Avoid Common Mistakes

Common Mistakes in Onions Gardening

When it comes to growing onions in Florida, there are a few common mistakes that can prevent you from growing healthy, hearty bulbs. Here are a few tips to help you avoid making these mistakes:

  • Don’t over-fertilize: Adding too much nitrogen to your soil can cause your onions to become overly leafy and produce small bulbs.
  • Don’t plant too deeply: Planting your onion bulbs too deep can prevent them from developing properly. The bulbs should be planted just below the surface of the soil, with the tips sticking out.
  • Don’t over-water: Onions don’t need a lot of water, so avoid over-watering them. Wet soil can cause the bulbs to rot.

By avoiding these common mistakes and following the steps outlined above, you can successfully grow and store onions in your Florida garden. With a little patience, you’ll be enjoying fresh, delicious onions all year round!