Planting Guides
When to Plant Cucumbers in Raleigh: Complete Guide + Best Varieties for Zone 7b
Raleigh, North Carolina
USDA Zone 7b
Last Frost: Apr 5
Last updated: October 30, 2025
Learn when to plant cucumbers in Raleigh with specific dates for Zone 7b. Compare 6 varieties and discover which produce best in North Carolina's Piedmont clay and humid summers.
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Quick Answer
Direct sow cucumbers in Raleigh after April 15 when soil reaches 60°F. Start seeds indoors March 15-22 for earliest harvest.
TL;DR
Direct sow cucumbers in Raleigh from mid-April through July once soil reaches 60°F (16°C). Start seeds indoors March 15-22 for transplants after the April 5 last frost. Cucumis sativus 'Marketmore 76' is the top choice for Raleigh's heavy Downy Mildew pressure. The 214-day growing season (April 5 – November 5) supports 4-5 succession plantings and an excellent fall crop from August sowings that often outperforms the heat-stressed summer harvest.
Frequently Asked Questions
When is the best time to plant cucumbers in Raleigh?
Direct sow cucumbers from mid-April through late July once soil reaches 60°F (16°C) at 4 inches deep. For the earliest harvest, start seeds indoors March 15-22 and transplant after the April 5 last frost. Succession plant every three weeks through July for continuous harvest from late May through October. Plant a fall crop in early August for the best-quality fruit of the year as cooler temperatures reduce disease pressure and improve flavor.
What is the best cucumber variety for Raleigh?
Cucumis sativus 'Marketmore 76' is the clear top choice for Raleigh's Piedmont climate. Its disease resistance package—Scab, CMV, and intermediate Downy and Powdery Mildew resistance—provides 3-4 weeks more productive life than susceptible varieties in our humid conditions. The stay-green gene prevents fruit yellowing during July and August heat waves. For pickling, Cucumis sativus 'Boston Pickling' planted in August produces exceptional fall pickles. Avoid relying on Cucumis sativus 'Straight Eight' past early June.
How do I grow cucumbers in Piedmont red clay?
Amend the top 12 inches with 4-6 inches of compost to improve drainage—don't replace the clay entirely because it's mineral-rich. Better yet, build raised beds filled with 60% topsoil, 30% compost, and 10% perlite. The red clay beneath actually serves as a natural water reservoir during dry periods. Get a soil test from the NC State Extension Soil Lab for about $4 to determine your specific pH and nutrient levels before amending. Most Piedmont soils are already in the 6.0-6.5 pH range that cucumbers prefer.
Why do my cucumbers die in July in Raleigh?
Downy Mildew. Spores migrate north from Florida each summer and reach central North Carolina by June. The combination of warm temperatures and high Piedmont humidity drives rapid disease progression—susceptible varieties can collapse within two weeks of first symptoms appearing. The solution is planting Cucumis sativus 'Marketmore 76' for resistance, trellising for airflow, watering at the base only, and succession planting so fresh vines replace declining ones throughout the season.
Should I plant a fall cucumber crop in Raleigh?
The fall crop is often the best of the year. Cucumis sativus 'Boston Pickling' and Cucumis sativus 'Marketmore 76' planted in early August mature into September and October when Downy Mildew pressure decreases, pollination improves as temperatures moderate, and fruit quality surpasses the heat-stressed summer harvest. The cooler Piedmont fall nights produce cucumbers with exceptional crispness and flavor. Row covers extend the fall harvest 2-3 weeks past the November 5 frost date.
How many succession plantings work in Raleigh?
Raleigh's 214-day growing season supports 4-5 succession plantings spaced three weeks apart. A typical schedule: first transplant mid-April, second sowing early May, third late May, fourth mid-June, and a fall crop in early August. This staggered approach is essential because Downy Mildew pressure means individual plantings produce for 4-8 weeks before declining. The overlapping harvests from each succession ensure continuous cucumber supply from late May through October without gaps. Planning succession dates in advance and starting seeds on schedule is the most important habit for productive Raleigh cucumber growing.
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Written By
A
Aisha Patel
Aisha manages a small tropical nursery on the east side of Houston, specializing in plants that can handle the Gulf Coast's humidity, heat, and unpredictable flooding. She studied horticulture in college and worked at a wholesale grower before opening her own operation. Growing up, her parents kept a kitchen garden with okra, bitter gourd, and curry leaf plants—a tradition she's continued. Houston's subtropical climate lets her grow things most of the country can't, but it also means dealing with fungal issues, standing water, and summers where it's too hot for even tomatoes. Aisha writes about tropical and subtropical plant care, humidity management, and working with heavy clay soils.
