Lavender in Zone 8A — Florida

Lavender is worth the effort here in Florida. It brings a touch of the Mediterranean to your garden, and the fragrance is amazing. You can use it in cooking, crafts, or just enjoy the calming scent. Plus, seeing those purple blooms thrive in your garden is really satisfying.

Our Florida gardening calendar is different, and the summer heat and humidity can be brutal on many plants. But by starting lavender at the right time and giving it the conditions it needs, you can definitely grow it successfully. With our long 283-day growing season, you’ve got a solid window to make it happen.

Starting lavender from seed indoors gives you a head start, but honestly, it can be a bit tricky. Lavender seeds are slow to germinate, so this method is best if you are looking for a fun project. Late December through mid January is the time to get those seeds going, about 10 weeks before you want to put them in the ground.

Use seed trays with a well-draining seed starting mix. Keep the soil consistently moist (bottom watering helps prevent damping off) and provide warmth and plenty of light. Remember, our spring character is reversed here; you're trying to get a jump on the heat that's coming.

Transplanting lavender outdoors should happen mid March through early April. Before you plant, harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This will help them adjust to the Florida sunshine and temperatures.

Space your lavender plants 12-18 inches apart to give them room to grow into their mature size. Honestly, for more reliable results, consider buying lavender starts from a local nursery. They're already established and ready to take off, which is a big advantage when dealing with our unpredictable late-winter weather.

Watering lavender in Florida is all about finding the right balance. These plants are drought-tolerant and hate wet feet. Our biggest challenge is the very-high humidity and wet-summer rainfall.

During the cooler, drier months, water deeply but infrequently. Stick your finger about 2 inches into the soil; if it feels dry, it's time to water. Aim for about 1 inch of water per week, watering at the base of the plant to avoid getting the foliage wet. Overhead watering, especially in our humid climate, can lead to fungal diseases.

Once the summer heat kicks in, you might need to water a bit more often, but be careful not to overdo it. Yellowing leaves can be a sign of overwatering, while wilting indicates underwatering. A light layer of pine straw mulch can help retain moisture in the soil without suffocating the roots.

Pruning lavender is key to keeping it healthy and productive. The main goal is to deadhead the spent flowers and shape the plant.

After the flowers fade, usually after the first big bloom, prune the stems back by about one-third, shaping the plant into a nice, rounded mound. Be careful not to cut into the old wood, as lavender doesn't typically regrow from there. As the first frost approaches around early December, give your lavender one last light trim to tidy it up for the winter.

You can expect your first lavender harvest in early June through late July. The best time to harvest is when the flower buds are showing their color but haven't fully opened yet. This is when the fragrance is most intense.

Cut the long stems in the morning, after the dew has dried. Gather them into small bundles and hang them upside down in a cool, dark, and dry place to dry. Cutting the stems encourages the plant to produce more flowers, so you can enjoy a continuous harvest throughout the season. As the first frost approaches, harvest any remaining flowers to dry and use indoors.

Lavender can face a few challenges in Florida's climate. Here are three common problems and how to deal with them:

Root Rot from Overwatering

• What it looks like: Yellowing leaves, wilting, and a general decline in the plant's health. The roots will appear brown and mushy.
• What causes it: Overwatering and poorly draining soil, which are common issues with our wet-summer rainfall and high humidity.
• How to fix/prevent it: Ensure your lavender is planted in well-draining soil. Water only when the top few inches of soil are dry. Consider planting in raised beds or containers to improve drainage.

Shab Disease

• What it looks like: Brown or black spots on the leaves and stems, leading to dieback.
• What causes it: A fungal disease that thrives in humid conditions.
• How to fix/prevent it: Improve air circulation around the plants by spacing them properly and pruning regularly. Remove and destroy any affected plant material. Fungicides can be used as a preventative measure, but good cultural practices are the best defense.

Phytophthora

• What it looks like: Sudden wilting and death of the plant, often accompanied by dark lesions on the stem near the soil line.
• What causes it: A soilborne pathogen that attacks the roots, especially in wet conditions.
• How to fix/prevent it: Ensure excellent drainage. Avoid overwatering. Use disease-free plants and consider soil solarization before planting. Fungicides can offer some protection, but prevention is key.

Florida Specific Challenges: The combination of hot heat, very-high humidity, and wet-summer rainfall creates a perfect environment for fungal diseases. Proper watering practices, good air circulation, and disease-resistant varieties are essential for growing lavender successfully here.

When choosing companion plants for lavender, think about what thrives in similar conditions. Rosemary, thyme, and sage are all excellent companions because they prefer well-drained soil and full sun, just like lavender. They also attract beneficial insects that can help control pests. Roses also make good companions, sharing similar needs for sun and drainage, while adding beauty to your garden.

Avoid planting mint near lavender. Mint is invasive and can quickly take over, crowding out your lavender. Mint also prefers moist soil, which is the opposite of what lavender needs to thrive.