Summer Squash (includes zucchini)
Summer squash are warm season vegetables in the cucurbit family. Many of them have been bred to be short, compact bush vines rather than large ramblers. Like all cucurbits, squash plants have male and female flowers. Encourage bees for best pollination.
Cultural tips for growing squash, UC IPM
Planting
- Direct seed 24 inches apart in May to July.
- Transplant 24 inches apart in May to July, possibly April depending on weather and local conditions.
- For best results, wait until daytime temperatures are regularly over 70°F and soil temperature is over 65°F.
- If growing your own seedlings, start the seeds 4 weeks before you want to plant.
Harvesting
- Harvest squash while young and tender before they get too large and become tough.
- June to October, depending on variety and when planted.
Pest management
- Follow good cultural practices to prevent powdery mildew.
- Treat squash bugs aggressively if found on plants.
Pests and disorders of squash, UC IPM
More links
Recommended Varieties for Santa Clara County*
| Astia zucchini F1 | French variety for containers & small gardens. Glossy green fruits on compact vines, early and productive. |
| Cocozelle zucchini | Italian heirloom, dark green with light stripes. Compact and early. Pick as baby squash or up to 12 inches. |
| Peter Pan pattypan F1 | Light green, meaty scalloped squashes, vigorous and early. Delicious, sweet flavor. Pick at 1 to 3 inches. AAS winner. |
| Romanesco F1 | Italian type, dark green with light stripes. Early, productive, delicious. |
| Starship pattypan F1 | Dark green scalloped squashes on vigorous, compact plant. Pick when small 3 to 4 inches. |
| Sunburst pattypan F1 | Tender, golden scalloped squash on a vigorous plant. Pick tiny with the blossom still attached or teacup-size. AAS winner. |
| Sunny Supersett F1 | Delicious yellow crookneck with tender skin and nutty flavor. Bush plants are mildew resistant and productive. |
Other recommended varieties: Aristocrat, Goldrush, Horn of Plenty, Raven
* Many other varieties may also do well here in Santa Clara County. This list is based on UC Master Gardener trials, taste tests, and feedback from local growers.