When to Plant Squash (Summer) in North Carolina
Zucchini and yellow squash are the garden's most generous producers. You'll be sharing with neighbors by midsummer.
The Short Answer
North Carolina Frost Dates
Your planting dates depend on which part of North Carolina you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Mountains | 5b, 6a, 6b | Apr 25 - May 15 | Sep 25 - Oct 10 |
| Piedmont | 7a, 7b | Apr 1 - Apr 15 | Oct 20 - Nov 5 |
| Coastal Plain | 7b, 8a | Mar 15 - Apr 1 | Nov 1 - Nov 15 |
Squash (Summer) Planting Schedule for North Carolina
Mountains (Zones 5b, 6a, 6b)
Average last frost: Apr 25 - May 15 · Average first frost: Sep 25 - Oct 10
Piedmont (Zones 7a, 7b)
Average last frost: Apr 1 - Apr 15 · Average first frost: Oct 20 - Nov 5
Coastal Plain (Zones 7b, 8a)
Average last frost: Mar 15 - Apr 1 · Average first frost: Nov 1 - Nov 15
Growing Squash (Summer) in North Carolina
State-Specific Growing Tips
Mountains: direct sow from mid-May. Piedmont: direct sow from late April to early May. Coastal plain: direct sow from early to mid-April, with a fall crop started in late July or early August. NC State Extension recommends planting squash on raised hills or mounds throughout the Piedmont to combat clay drainage issues. In the sandy coastal soils, add compost and mulch generously for moisture retention. Succession plant summer squash every 3-4 weeks to maintain production as older plants succumb to vine borers or disease.
Recommended Varieties for North Carolina
NC State recommends Multipik and Dividend for yellow squash and Judgement III for zucchini in their variety trial results. For winter squash, Butternut Waltham and Table King Acorn are reliable across all three regions. Mountain gardeners should choose shorter-season winter squash varieties to ensure maturity before frost.
Common Challenges in North Carolina
Squash vine borer emerges earlier in North Carolina than in northern states — begin monitoring in early June on the Piedmont and coastal plain. Cucumber beetles appear in spring and vector bacterial wilt. Downy mildew, distinct from powdery mildew, is particularly aggressive in the eastern part of the state during humid summers. In the coastal plain, pickle worm damage to fruits increases as summer progresses.
Growing Tips
Harvest when fruits are 6-8 inches long for best flavor. Larger squash become seedy and tough.
Companion Planting
Plant squash (summer) alongside these companions for better growth:
Keep squash (summer) away from:
The Bottom Line
Last reviewed: March 29, 2026