Acorn Squash in Zone 7A — Southeast

Acorn squash is a fantastic addition to any Southeast garden. It's delicious roasted, stuffed, or in soups, and its nutty flavor complements many Southern dishes. Growing your own is especially rewarding, and nothing beats the taste of a homegrown squash picked fresh from your backyard.

While our hot and humid summers here in the Southeast can present challenges, Acorn squash thrives with proper timing and care. Our long growing season, often stretching 225 days, gives you ample opportunity to produce a bountiful harvest. With a little attention to disease prevention and pest control, you'll be enjoying homegrown acorn squash in no time.

Starting Acorn squash indoors is possible, but direct sowing is generally preferred here in the Southeast, given our long growing season. However, if you're eager to get a head start or want to ensure germination, starting seeds indoors from mid-March through early April is a good option. This gives you about a 3-week head start before transplanting.

Use seed trays or peat pots filled with a good quality seed-starting mix. Keep the soil consistently moist, using bottom watering to avoid damping off, and provide warmth and plenty of light. Our moderate spring weather means you likely won't need supplemental heat, but a sunny windowsill or grow light will help.

Transplanting Acorn squash seedlings outdoors should happen from early April through early May, after the danger of frost has passed. 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 sun and wind.

When transplanting, space plants 36-48 inches apart to allow for adequate growth. Be mindful of late cold snaps common in our region during this period, and be ready to cover your seedlings if necessary.

Direct sowing is the recommended method for growing Acorn squash in the Southeast. Our long growing season makes it easy to get a great harvest. Direct sow from early April through late July.

Choose a sunny spot with well-drained soil. Acorn squash prefers soil temperatures above 60°F for optimal germination. Amend your clay soil with compost or other organic matter to improve drainage and fertility. Sow seeds 1 inch deep and space them 36-48 inches apart.

Acorn squash needs consistent watering, especially during the hot and humid summer months in the Southeast. While we get regular rainfall, it's important to supplement when needed. Aim for about 1-2 inches of water per week, especially during fruit development.

Use the "finger test" to check soil moisture. Stick your finger about 2 inches deep into the soil. If it feels dry, it's time to water. Water deeply at the base of the plant, avoiding overhead watering as much as possible to minimize fungal disease in our humid climate.

Signs of underwatering include wilting leaves and stunted growth. Overwatering, on the other hand, can lead to root rot, especially in our clay soil. Yellowing leaves and a mushy base of the stem are signs of overwatering. Mulching around your plants with straw or pine straw helps retain moisture, suppresses weeds, and keeps the soil cooler during our hot summers.

You can expect your first Acorn squash harvest from late June through early November, depending on when you planted. Acorn squash is typically ready to harvest around 85 days after planting. Look for a dark green skin with a noticeable orange spot where the squash has been resting on the ground.

The shell should be hard, and the stem should be dry and starting to crack. Use a sharp knife or pruners to cut the squash from the vine, leaving a few inches of stem attached. Unlike some other squash, Acorn squash won't ripen off the vine, so it's important to wait until it's fully mature before harvesting.

As the first frost approaches in early November, harvest any remaining squash, even if they're not fully ripe. Smaller, immature squash can still be used in cooking, although they may not be as sweet.

Here are some common problems you might encounter growing Acorn squash in the Southeast:

Squash Vine Borer *What it looks like:* Wilting vines that suddenly collapse, often with small holes near the base of the plant and sawdust-like frass (borer poop). *What causes it:* Moth larvae that bore into the stems and feed on the plant's tissue. Common in the Southeast due to our long, warm summers. *How to fix/prevent it:* Wrap stems with foil or netting to prevent moths from laying eggs. Inject Bacillus thuringiensis (Bt) into the stems to kill the borers. Remove and destroy infested vines.

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.

Southeast Specific Challenges: Our hot and humid climate creates ideal conditions for fungal diseases like powdery mildew. The humidity also encourages pests like squash bugs and cucumber beetles. Regular monitoring and proactive measures are key to keeping your Acorn squash healthy and productive here in the Southeast.

Companion planting can significantly benefit your Acorn squash in the Southeast. Corn provides a natural trellis for the squash vines, while beans (green) fix nitrogen in the soil, enriching it for the squash. Radishes deter squash vine borers, and marigolds repel many pests, including nematodes.

Avoid planting Acorn squash near potatoes, as they compete for nutrients. Brassicas (cabbage, broccoli, etc.) can also inhibit squash growth. By choosing the right companions, you can create a thriving and pest-resistant garden for your Acorn squash.