Bok Choy in Zone 8A — Florida

Bok choy is a fantastic addition to your Florida garden. Its mild, slightly sweet flavor adds a delicate crunch to stir-fries, soups, and salads, and it’s packed with vitamins. Plus, you can harvest it at different stages for baby bok choy or full-sized heads, offering versatility in the kitchen and a satisfying yield in our extended growing season.

Sure, we have our challenges here in Florida, like humidity and the occasional pest. But with careful timing, you can easily grow delicious bok choy during our cooler months. Our 283-day growing season means you can plant in fall and harvest through winter, skipping the worst of the summer heat.

While you *can* start bok choy indoors, it's not always necessary here in Florida. Direct sowing often works just as well, and it saves you a step. But if you want a head start, especially for an earlier harvest, starting seeds indoors from late January through mid February is a good option.

Use seed trays with a good seed-starting mix and keep them in a warm spot, ideally with supplemental light. Bottom watering helps prevent damping-off, a common problem in our humid climate. Remember, our spring is reversed here in Florida, so starting early helps you get ahead of the heat.

If you started your bok choy indoors, transplant them outdoors from late February through early April. Before transplanting, harden them off for about a week by gradually exposing them to outdoor conditions. This helps them adjust to the Florida sun and humidity.

Space the seedlings 6-10 inches apart in well-drained soil. Keep an eye on the weather forecast – those late cold snaps can still happen, so be ready to cover your transplants if needed.

Direct sowing bok choy is a breeze in Florida, and it's my preferred method. You can sow seeds mid February through early October, giving you a long window of opportunity. Prepare your soil by loosening it and adding some compost.

Make shallow furrows, sow seeds about ½ inch deep, and space them 6-10 inches apart. Keep the soil consistently moist until the seedlings emerge. Direct sowing avoids transplant shock and allows the plants to establish strong roots right from the start.

Watering is critical for bok choy in Florida, especially with our humidity. Aim to keep the soil consistently moist, but not waterlogged. Stick your finger about 2 inches into the soil – if it feels dry, it's time to water.

During the cooler months, you'll likely need to water 1-2 times per week, providing about 1 inch of water each time. In our wet summer season, you may not need to water at all, unless we have a dry spell. Water at the base of the plants to avoid wetting the leaves, which can encourage fungal diseases in our humid climate.

If the leaves are wilting and the soil is dry, you're underwatering. If the leaves are yellowing and the soil is constantly soggy, you're overwatering. A layer of mulch around your bok choy plants helps retain moisture and suppress weeds, which is especially useful with our sandy soil.

You can expect your first harvest of bok choy from late March through mid December, about 45 days after planting. You can harvest baby bok choy when the leaves are 6-8 inches tall, or wait for full-sized heads at 12-15 inches. The leaves should be firm and vibrant green.

To harvest, cut the entire head above the base, leaving the roots intact. This encourages regrowth, giving you multiple harvests from a single plant. Keep an eye on the weather as our first frost approaches in early December. You can extend the harvest by covering your plants with a frost blanket if a freeze is predicted.

Here are some common problems you might encounter growing bok choy in Florida:

Flea Beetles

• What it looks like: Tiny round holes (shot-hole pattern) in the leaves. You might see small dark beetles jumping when disturbed. Seedlings are most vulnerable.
• What causes it: Small jumping beetles that feed on the leaves. They thrive in warm, dry conditions, so even though Florida is humid, they can be an issue during drier spells.
• How to fix/prevent it: Use row covers to protect young seedlings. Consider delaying planting until plants are larger and stronger. Kaolin clay coating can deter them. Neem oil spray can also help. Interplant with basil or catnip to repel them.

Cabbage Worms

• What it looks like: Smooth green caterpillars chewing irregular holes in the leaves. You'll see dark green droppings and white butterflies fluttering around your plants.
• What causes it: The larvae of white cabbage butterflies. They love brassicas and can go through multiple generations in our warm climate.
• How to fix/prevent it: Bt spray is very effective at controlling cabbage worms. Floating row covers will prevent the butterflies from laying eggs. Handpick the caterpillars when you see them. Interplant with aromatic herbs like thyme and sage to deter them.

Slugs

• What it looks like: Irregular holes in the leaves, especially on lower leaves. Silvery slime trails are a dead giveaway. Damage is worse at night and in wet weather.
• What causes it: These gastropods love to feed at night in moist conditions. They hide under mulch and debris during the day. Our humidity makes them a constant threat.
• How to fix/prevent it: Beer traps (shallow dishes of beer sunk into the soil) work well. Iron phosphate bait is pet-safe. Remove any hiding spots like boards or piles of leaves. Water in the morning so the soil surface dries out by evening. Copper tape around your beds can also deter them.

Bolting in Heat

• What it looks like: The plant sends up a flower stalk, and the leaves become tough and bitter. Harvest quality declines rapidly.
• What causes it: Bok choy is a cool-season crop, and it bolts when temperatures consistently rise above its comfort zone. This is a big problem in Florida as our days often exceed 80°F.
• How to fix/prevent it: Time your plantings carefully for the cooler months. Choose bolt-resistant varieties. Provide shade during warm spells with shade cloth. Mulch to keep the soil cool. Harvest your bok choy before it starts to bolt.

Florida Specific Challenges: Our hot, humid summers can be tough on bok choy. The high humidity promotes fungal diseases, and the heat can cause bolting. Make sure to water carefully, provide good air circulation, and choose disease-resistant varieties to give your bok choy the best chance.

Good companions for bok choy in Florida include garlic and onions. These alliums help repel pests like aphids and cabbage moths. Beets are also beneficial, as they don't compete for the same nutrients and can help loosen the soil. Lettuce and spinach make good ground cover, suppressing weeds and keeping the soil cool.

Avoid planting bok choy near strawberries or tomatoes. Strawberries can attract slugs, which will then feast on your bok choy. Tomatoes are heavy feeders and can compete with bok choy for nutrients, especially in our sandy soil.