How to Grow Squash Plants

Squash plants go by different names, and the Native Americans called it isquoutersquash. Still, the British call it marrow, while Americans call it squash plants.

Still, no matter what it is called, you can enjoy growing squash in your vegetable garden to make a hearty meal, whether you have zucchini, summer squash, or winter squash.

So, you can sow seeds in late spring and enjoy a second planting of squash plants if you live in a region with air temperatures remaining 65ºF.

Plant Name: Cucurbita spp

Other Name: Squash plants

Plant Type: Vegetable

Native Areas: American tropics

Light Requirement: Full sun

Watering: Deep watering

Fertilizer: Organic matter or compost

Toxicity: Non-toxic

Temperature: Cool to warm weather

Propagation: Squash seeds or seedlings

Growth: Depends on variety

Soil Type: Compost-rich, well-draining soil

USDA Hardiness Zones: Grown as annuals

More About Squash Plants

Squash plants belong to a large group that belongs to the cucumber family known as Cucurbita. The group includes summer squash varieties, pumpkins, and winter squash. The requirements for squash plants are the same except when you must gather squash at different times.

Squash plants have broad leaves with up to six stems or vines that grow from a central root system. Your winter squash can grow in a bush form while others sprawl. Even winter squash seeds look distinct as it has a cavity.

The botanical name for the summer squash is Cucurbita, and the winter varieties are Cucurbita maxima and Cucurbita moschata.

Planting Squash and Care

No matter what squash you grow, it needs full sun and well-drained soil. But if you want to get a jump start ahead of the season, you can start the seeds indoors about four weeks before the last frost date. You can sow seeds in biodegradable pots, also known as peat pots, and transplant the squash seedlings directly into the ground.

A week before you transplant the seedlings, it helps to harden them off by lowering the nighttime temperature and watering less. Another essential thing to remember is that zucchini and other squash species have separate female flowers and male blossoms.

Hence, they are monoecious, and the male blossoms and female flowers develop on the same plant.

Sowing Squash Seeds Summer and Winter Squash

When sowing seeds, plant summer squash with 65 frost-free days to mature. Thus, you can plant summer squash in the last week of spring. In contrast, winter squash needs longer to reach a mature size up 💯 frost-free days.

You can plant winter squash in late spring to harvest before the first frost. Varieties like the summer squash and zucchini are frost-tender and warm-season annuals. Some popular varieties are the straight neck, zucchini, scallop, and crookneck.

An excellent example of summer squash is your yellow squash variety.

The opposite happens for sowing seeds in the winter variety as you harvest in the fall to store for winter use. Unlike summer squash, you harvest winter squash when the skins are hard, like butternut squashes or acorn squash.

The fruit of winter squash reaches up to 30 inches long in different shapes and sizes, from oblong, turban, and cylindrical squash. Winter squash grows and matures on the vine until the skin is hard in the garden.

You can sow the winter squash seeds or the seedlings in your garden after the soil warms up to 60°F. But not sooner than three weeks before the last frost date in spring. The squash vines need temperatures ranging from 65°F to 80°F.

The Best Time to Plant Squash

Whether you grow buttercup squash or are interested in delicata squash, you can sow the seeds indoors about four weeks before the expected frost in spring. To direct sow seed in the vegetable garden, wait until the soil temperature warms up and use row covers to protect them from cool temperatures.

So, for short, ensure the following:

• Start seeds indoors for transplanting two to four weeks before the last frost in spring.

• Transplant squash seedlings two to three weeks after the last frost in the vegetable garden.

• Direct sow the seed three weeks after the last frost when soil temperature rises. Protect them with row covers for cool night temperatures.

Where to Plant Your Squash

Whether you have any of the following:

• Acorn Squash

• Yellow Squash

• Butternut Squash

• Sugar Pumpkin

• Scalloped Squash

• Baby Squash

• Spaghetti Squash or other varieties

Plant squash in direct sun with loose, well-drained soil amended with organic matter. You can prepare the planting beds in advance using compost before growing squash. Squash prefers growing in a soil pH of 5.5 to 6.8, and your winter squash needs ample space to sprawl using a trellis or A-frame to protect the fruit on the vines.

Tips For Sowing Seeds

1. Sow your squash seeds about three inches deep.

2. Provide the plants a space on raised or inverted hills, sowing four to five seeds up to four inches apart. You can thin them out, leaving the two strongest seedlings.

3. Space your hills apart eight feet.

4. Plant seeds in rows of two about ten inches apart in rows five feet apart.

5. You can thin the seedlings out by cutting off the week one to soil level using scissors.

Container-Grown Summer Squash

The bush-type squash can grow in a container but has a long season. You can sow up to three seeds in the middle of the container to thin out the weakest ones once they reach four inches long.

You can extend the growing season by planting early and moving the posts indoors when you notice frost.

Watering

During hot weather, the plant stem needs a lot of water as it might wilt and use up water faster. The squash plant grows in evenly moist soil, and as long you provide deep watering, it will not wilt. When growing squash and you notice them looking wilted in the morning, you need to water them.

When you do irregular watering, and the soil has a calcium deficiency, it results in poor water uptake resulting in blossom end rot of the ripening fruit and the plant stem. You can use oysters or egg shells to add calcium to the ground.

Fertilizing Squash

When growing squash, they are heavy feeders, and preparing a planting bed with organic matter helps. You can use aged compost across the planting bed and turn it under.

When you notice the squash foliage growing pale and not dark green leaves, side dress them with compost or use a foliar spray like kelp fertilizer high in phosphorus. We do not recommend using a high-nitrogen feed as you will have more foliage than fruit growth.

Compost can be added before you plant squash.

During the growing season, you can use a slow-release fertilizer every two to three weeks.

How to Harvest Squash

Before the seeds develop on your tender summer squash, you can harvest them. Once the squash plant bears fruit, you can harvest it twice or thrice. Harvest your summer squash when it reaches up to six inches long using a knife, and ensure to clean it afterward to prevent spreading diseases.

You can harvest zucchini to patty pans and yellow squash 65 days from sowing. You can pick them young before seeds form and never leave them to mature, as it will suppress the squash blossoms.

You can eat the male squash blossoms to help boost the plant’s productivity.

You can dip the flowers in a batter to deep fry.

To store summer squashes, you can keep them in the refrigerator for a week. Only wash the vegetables when you are ready to use them. You can cook them to freeze, pickle, dry, or can them.

Winter squash takes up to 100 days to mature but depends on the variety.

Winter Squash Needs Curing

After harvesting, you must cure winter squash plants outdoors to allow the skin to dry and toughen in full sun for seven days. When you gather winter squash and leave them to cure, please place them in a well-ventilated dry spot for three weeks.

You can keep winter squashes for up to six months, and those like acorn squash with softer skin can rot in storage and should be cooked and used.

Squashes, Pests, and Diseases

Pests

To successfully grow your summer squash to even your winter squash, you must control the following:

• Cucumber Beetles emerge in spring and feed on the leaves and the fruits.

• Squash Vine Borers will bore into the stems to eat it. The squash vine borer will leave trails like sawdust at small holes, and your plant will wilt and die.

• Squash Bugs will also eat away the foliage and cause damage.

Cover your plants with floating row covers to control these pests until they bloom. Remove the row covers when you notice squash blossom to ensure pollination takes place.

You can also use a sharp knife to remove the squash vine borers, and another alternative is to introduce natural predators or yellow sticky traps. Out of all the pests, the squash borers are the worst.

Diseases

You need to remove plants to dispose of them when it comes to diseases. Here are some common conditions that affect your plants.

• Bacterial wilt spreads through cucumber beetles; you can handpick them off the plants.

• Powdery mildew will make the leaves turn gray-white later in the growing season, and ensuring that you provide proper spacing to increase air circulation helps.

• The mosaic virus will make the plant yellow, leading to stunted growth. It spreads through aphids, and you must remove the infected plants.

• Blossom end rot will make the fruit start rot from the squash flowers. It happens when you do not maintain moisture in the soil, and the temperature fluctuates.