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How to grow summer squash

Cucurbita pepo (Crookneck Group) · cucurbitaceae family · annual crop

Summer squash is a warm-season crop, started from seed in the garden or transplanted, and planting opens once soil reaches about 60°F; varieties in the library mature in 50 to 58 days.

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Summer squash is a fast, prolific vine or bush crop, picked and eaten while still immature, skin, seeds and all, rather than left to cure into a hard-shelled winter type. Gardeners grow it because a handful of plants can supply a household through most of the summer, with new fruit forming every few days once the vines settle in. The plant carries separate male and female flowers on the same vine, both edible, and a productive hill can crowd out a surprising amount of garden space by midsummer.

The hardest part of growing summer squash well is keeping up with the harvest pace once plants hit their stride. University of Minnesota Extension warns that leaving oversized fruit on the vine causes the whole plant to slow its yield, not just the one fruit that got away. A second-year gardener who skips a day or two of picking during a busy week returns to find a fruit that has swollen past its prime, tough-skinned and full of hard seeds, and by then the plant has already begun redirecting energy away from setting new fruit. Removing the oversized fruit helps, but the yield dip from that stretch does not fully recover.

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Growing basics

Summer squash is a warm-season crop, started from seed in the garden or transplanted.

Seeds germinate once soil reaches about 60°F.

Varieties in the library run 50 to 58 days to maturity.

Grows best in full sun.

Frost-tender: plants go out after the last frost.

Space plants about 24 inches apart.

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Common questions

When do you plant summer squash?

Summer squash is a warm-season crop, started from seed in the garden or transplanted. Plants go out after the last frost. Planting opens once soil reaches about 60°F.

What soil temperature does summer squash need?

Seeds germinate once soil reaches about 60°F.

How far apart do you space summer squash?

Space plants about 24 inches apart.

How long does summer squash take to mature?

Varieties in the library run 50 to 58 days from planting to harvest.

5 varieties of summer squash in the library

Sunburst · Yellow Crookneck · Pattypan · Yellow Straightneck · Bennings Green Tint

Each has a full cited page in the library.

Pests and diseases we cover

Identification and treatment for each, with photos, in the library.

Row & Bed covers 5 summer squash varieties, each with a cited care timeline and fertilization schedule, identification and treatment for the pest and 5 diseases that reach them, and planting windows worked out for your ZIP.

Set up your garden

See something that does not match your garden? Write to andy@rowandbed.com.