Acorn Squash in Zone 8A — Florida

Acorn squash is a fantastic addition to your Florida garden, offering a sweet, nutty flavor that's perfect for roasting, stuffing, or using in soups. Imagine enjoying a hearty squash dish made with your own homegrown produce during our cooler months – a welcome change from the summer heat! Plus, it's incredibly satisfying to harvest your own food.

While Florida gardening definitely has its challenges – humidity, pests, and the occasional hurricane – with proper timing, you can absolutely grow acorn squash successfully. Our long, 283-day growing season gives you a decent window to get a crop in, especially if you plant in fall and harvest in winter.

Starting acorn squash indoors is an option, but honestly, direct sowing is usually the way to go here in Florida. However, if you're eager to get a jump start, you can begin indoors from mid-February through early March, about three weeks before you'd typically transplant. Use seed trays filled with a good seed-starting mix, and keep them warm and well-lit.

Remember to water from the bottom to avoid damping off, which can be a real problem with our high humidity. Keep in mind that our spring is reversed, so starting too early indoors can lead to leggy plants that struggle when transplanted into the already warming ground.

If you started your acorn squash indoors, aim to transplant them outdoors from mid-March through early April. Before transplanting, be sure to harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This will help them adjust to the Florida sun and wind.

Space your plants 36-48 inches apart to give them plenty of room to sprawl. Keep an eye on the weather; those late-season temperature swings can still happen, so be ready to cover your seedlings if a cold snap is predicted.

Direct sowing is the preferred method for acorn squash in Florida. You can sow seeds directly into the garden from early March through late August. Choose a sunny spot with well-drained soil.

Prepare the soil by amending it with compost or other organic matter to improve drainage and fertility. Plant seeds about an inch deep and space them 36-48 inches apart. Winter squash needs a long growing season, but direct sowing works well for us since our "winter" is mild and long enough.

Watering is crucial for acorn squash, especially in Florida's climate. While they need regular moisture, our high humidity and summer rains mean you have to be careful not to overwater. During the hotter, drier periods of spring and fall, aim to give your plants about 1-2 inches of water per week.

Stick your finger about 2 inches into the soil to check moisture levels before watering – if it feels dry, it's time to water. Water at the base of the plant to avoid getting the leaves wet, which can encourage fungal diseases in our humid environment. As the fruit matures, you can reduce watering slightly to help the squash develop a concentrated flavor.

Signs of underwatering include wilting leaves and stunted growth. Overwatering can lead to yellowing leaves and root rot. Mulching around your plants with straw or pine needles helps retain moisture and suppress weeds, but be mindful of creating too much humidity around the base.

Here in Florida, you can expect your first acorn squash harvest from late May through early December, depending on when you planted. Acorn squash is ready to harvest when the skin is dark green with an orange spot where it touched the ground. The shell should be hard, and the stem should be dry and starting to crack.

To harvest, use a sharp knife or pruners to cut the squash from the vine, leaving a few inches of stem attached. This helps prevent rot. Acorn squash doesn't ripen off the vine, so make sure it's fully mature before harvesting.

As our first frost approaches around early December, harvest any remaining squash, even if they aren't fully ripe. While they won't be as sweet, you can still use them in soups or stews.

Here in Florida, acorn squash can run into a few common problems:

• Squash Vine Borer:
• What it looks like: Sudden wilting of the vine, often near the base. You might see small holes with sawdust-like frass (borer excrement) near the base of the plant.
• What causes it: The squash vine borer is a moth whose larvae burrow into the stems of squash plants. They thrive in warm weather.
• How to fix/prevent it: Wrap the base of the stems with aluminum foil or row covers to prevent the moths from laying eggs. Inject Bacillus thuringiensis (Bt) into the stems to kill the larvae. Remove and destroy infested vines after harvest.
• Powdery Mildew:
• What it looks like: White or grayish powdery coating on leaves, stems, and sometimes fruit. Leaves curl, yellow, and die. Reduces plant vigor.
• What causes it: Various fungi that thrive in warm days, cool nights, and moderate humidity. Dry leaf surfaces actually favor it (unlike most fungi).
• How to fix/prevent it: Improve air circulation through spacing and pruning. Remove affected leaves. Neem oil or potassium bicarbonate sprays help. Milk spray (1 part milk to 9 parts water) is surprisingly effective. Plant resistant varieties.
• Squash Bugs:
• What it looks like: Gray-brown shield-shaped bugs on leaf undersides. Bronze egg clusters on leaves. Wilting leaves that turn brown and crispy.
• What causes it: Sap-sucking insects that inject toxin while feeding. Adults overwinter in garden debris and emerge in spring.
• How to fix/prevent it: Hand-pick adults and crush egg clusters. Board traps (adults hide under boards at night — flip and destroy in morning). Neem oil spray. Remove plant debris in fall. Companion plant with nasturtiums.
• Cucumber Beetles:
• What it looks like: Small yellow-green beetles with black spots or stripes on leaves and flowers. Leaves have small holes. Plants may wilt suddenly from bacterial wilt transmitted by beetles.
• What causes it: Adult beetles feed on leaves and flowers and transmit bacterial wilt disease. Larvae feed on roots.
• How to fix/prevent it: Row covers until flowering (remove for pollination). Hand-pick adults. Yellow sticky traps. Neem oil or pyrethrin spray. Kaolin clay coating. Interplant with radishes or nasturtiums as trap crops.

Florida Specific Challenges: Our hot heat, very-high humidity, and wet-summer rainfall create a perfect environment for fungal diseases like powdery mildew and increase pest pressure. Sandy soil can also be an issue, so amending with plenty of organic matter is crucial for good drainage and nutrient retention.

Companion planting can be a great way to improve your acorn squash crop here in Florida. Corn provides a natural trellis for the squash vines and helps shade the soil, keeping it cooler and more moist. Green beans fix nitrogen in the soil, benefiting the squash. Radishes can deter pests like squash vine borers and cucumber beetles. Marigolds also deter pests with their strong scent.

Avoid planting acorn squash near potatoes, as they compete for nutrients. Also, avoid planting near brassicas (cabbage, broccoli, etc.) because they attract similar pests, increasing the risk of infestation.