Summer Squash Growing Guide

Planting Summer Squash

This chart provides a comprehensive guide to growing summer squash, covering key factors like temperature, sunlight, water requirements, soil pH, and growing zones.

Tip: Use our zone chart map to find your zone & when to plant.

Summer squash, including zucchini, patty pan, and other soft-skinned varieties, is a warm-season crop that thrives in full sun and warm soil. With the right conditions, these prolific plants will produce an abundant harvest all summer.

Planting & Temperature Considerations

Summer squash is susceptible to frost and cold temperatures. Wait until all danger of frost has passed and the soil has warmed to at least 70°F before planting.

Unlike winter squash or pumpkins, which grow on sprawling vines, most summer squash varieties have short, compact vines that make them perfect for containers or small garden spaces. Since they don’t require trellising, they are easy to manage.

Harvesting Summer Squash for Best Flavor

Harvest squash when the fruit is small and tender for the best texture and taste. Oversized zucchini and squash become woody, bland, and full of seeds. Frequent harvesting encourages plants to keep producing until the first frost.

Pest & Disease Management

Like other cucurbits, summer squash is vulnerable to several common garden pests and issues:

Common Pests: Watch for cucumber beetles, aphids, stink bugs, squash bugs, and squash vine borers, which can damage plants and reduce yield. Our insect identifier can help you learn more about common pests.
Diseases & Disorders: Squash is susceptible to lack of pollination and blossom end rot, which can impact fruit production. Ensuring good pollinator activity and consistent watering will help prevent these problems. Learn about these and more on our page about common plant problems.

Fertilizing Summer Squash

Feed plants with a balanced fertilizer, such as our standard 7-7-7, for steady growth and fruit development.

Recommended Planter Box

For best results, use the EarthBox Original container gardening system with our standard 7-7-7 fertilizer and dolomite. This system provides consistent moisture and nutrients, reducing the risk of common squash problems.

By following these tips, you’ll enjoy a steady supply of delicious summer squash all season long!