Acorn Squash in Zone 8B — Texas

Acorn squash is more than just a pretty face; it's a delicious and versatile addition to your Texas garden. Its nutty flavor shines in everything from savory roasts to sweet pies, and there's real satisfaction in harvesting your own winter squash right before the cooler weather hits – a welcome change from the brutal Texas heat.

Growing acorn squash here definitely has its challenges, from unpredictable weather to the relentless sun. But with our long, 273-day growing season, you can easily time your planting to avoid the worst of the heat and enjoy a bountiful harvest.

Starting acorn squash indoors is an option here in Texas, but honestly, direct sowing is usually the way to go. However, if we're expecting a particularly cool or wet spring, or if you just want a head start, you can start seeds indoors from mid February through early March. That gives you about 3 weeks before you'd want to transplant.

Use seed trays or small pots filled with a good seed-starting mix. Keep them warm (around 70-75°F) and provide plenty of light – a sunny windowsill or grow lights will work. Don't forget to water from the bottom to encourage strong root growth. Remember Texas has an early spring, so you'll have to keep an eye on soil temps.

If you started your acorn squash indoors, you can transplant them outdoors from mid March through early April. Be sure to harden them off first by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the Texas sun and wind.

Space your plants 36-48 inches apart, giving them plenty of room to vine. Keep an eye on the weather forecast – those late freezes can still sneak up on you, so be prepared to cover your seedlings if necessary.

Direct sowing is the most common and often easiest way to grow acorn squash here in Texas. You can direct sow from early March through mid August, giving you a nice long window to get your seeds in the ground.

Choose a sunny spot with well-drained soil. Amend the soil with compost to improve fertility. Acorn squash seeds germinate best when the soil temperature is around 70-90°F. Plant seeds 1 inch deep and space them 36-48 inches apart. Keep the soil consistently moist until the seedlings emerge.

Watering is critical for acorn squash, especially during our hot Texas summers. While they're not drought-tolerant, you can still manage watering by keeping an eye on your plants. Aim for consistent moisture throughout the growing season, providing about 1-2 inches of water per week, depending on rainfall.

Use the finger test to check the soil moisture – stick your finger about 2 inches deep; if it feels dry, it's time to water. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases in our variable humidity. Reduce watering slightly as the fruit matures to concentrate the sugars.

Pay attention to your plants. Wilting leaves in the morning, even after a good rain, can indicate underwatering. Yellowing leaves or mushy stems can be a sign of overwatering. Mulching around your plants with straw or wood chips helps retain moisture and suppress weeds, which is especially helpful in our climate.

In Texas, you can expect your first acorn squash harvest from late May through late November, about 85 days after planting. The key is to look for the right signs of ripeness.

The skin should be a dark, solid green 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 tough. Use a sharp knife or pruners to cut the squash from the vine, leaving a 2-3 inch stem attached.

As our first frost approaches in late November, harvest any remaining squash, even if they're not fully ripe. Smaller, less mature squash can still be used in cooking, though they may not be as sweet.

Acorn squash can face a few challenges here in Texas, but knowing what to look for can help you stay ahead of the game.

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. *What causes it:* The larvae of a moth that burrows into the stem and feeds on the plant tissue. *How to fix/prevent it:* Wrap the base of the stem with foil or fabric to prevent the moth from laying eggs. Inject Bt (Bacillus thuringiensis) into the stem to kill the larvae. Remove affected vines promptly.

Powdery Mildew *What it looks like:* White or grayish powdery coating on leaves, stems, and sometimes fruit. Leaves curl, yellow, and die. *What causes it:* Various fungi that thrive in warm days, cool nights, and moderate humidity. Dry leaf surfaces actually favor it. *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.

*Texas Specific Challenges:* Our hot-to-extreme heat can stress acorn squash plants, making them more susceptible to pests and diseases. Variable humidity can exacerbate fungal problems like powdery mildew. And unpredictable rainfall can make it difficult to maintain consistent soil moisture. Fire ants are always a nuisance, so be sure to keep them away from your plants.

Companion planting can give your acorn squash a boost. Corn provides a natural trellis for the vines to climb, and beans fix nitrogen in the soil, benefiting the squash. Radishes deter squash vine borers, and marigolds repel nematodes and other pests.

Avoid planting acorn squash near potatoes, as they compete for the same nutrients. Also, keep them away from brassicas like cabbage and broccoli, as they can attract the same pests.