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When to Plant Cumin in Clarendon County, SC

Cumin is a warm-season annual herb whose seeds are one of the most widely used spices globally. It requires a long, hot growing season of 3-4 months.

Clarendon County, South Carolina is in USDA Zone 8a. The average last spring frost is March 19 and the first fall frost is November 11, giving you a growing season of approximately 237 days.

At an elevation of 291 feet, Clarendon County receives approximately 53.6 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 94ยฐF, providing good warmth for Cumin during the growing season. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Cumin will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Cumin root diseases.

Clarendon County, SC (Zone 8a) Long season
237 days
Last Spring Frost March 19
237 growing days
First Fall Frost November 11

Clarendon County Soil Profile

Soil Type

Sandy Loam

Soil pH

5.1-6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (75 days to spare)
Start indoors: Feb 5 Transplant: Mar 5 🍅 Harvest: Jun 18 – Aug 20
Recommended (50%) ✓ Fits season (76 days to spare)
Start indoors: Feb 12 Transplant: Mar 12 🍅 Harvest: Jun 25 – Aug 27
Safe Start (90%) ✓ Fits season (69 days to spare)
Start indoors: Mar 3 Transplant: Mar 31 🍅 Harvest: Jul 14 – Sep 15

Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.

Plant Water Budget

Plant needs
0.5″/week
Rainfall provides
1.0″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Cumin needs ~2,255 GDD — county provides 4,858 GDD Excellent fit

Cumin Planting Timeline โ€” Clarendon County, SC

Cumin Planting Calendar

Activity When Date Range
Start Indoors February 12 Feb 12 โ€“ Feb 26
Transplant Outdoors March 12 Mar 12 โ€“ Mar 26
Direct Sow March 5 Mar 5 โ€“ Mar 26
Fall Sowing September 2 Sep 2 โ€“ Sep 16
Harvest June 25 Jun 25 โ€“ Aug 27

Plant 0.5" deep ยท 8" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February Start Indoors
March Transplant Outdoors Direct Sow
April โ€”
May โ€”
June Harvest
July Harvest
August Harvest
September Fall Sowing
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Low โ€” drought tolerant

Days to Maturity

100โ€“120 days

Soil pH

6 โ€“ 8

USDA Zone

Zone 8a

Growing Season

237 days

Growing Tips for Clarendon County

Start seeds indoors 4 weeks before last frost. Transplant after all danger of frost. Harvest when seed heads turn brown. Requires consistent warmth for proper seed development.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel

Level Up Your Garden

Frequently Asked Questions

When should I plant Cumin in Clarendon County, SC?

Clarendon County is in Zone 8a with an average last frost of March 19. Plan your Cumin planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Clarendon County, SC?

Clarendon County, South Carolina is in USDA Hardiness Zone 8a. The average last spring frost is March 19 and first fall frost is November 11.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Clarendon County gardeners in Zone 8a organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Clarendon County, SC. Local conditions may vary. Last updated: April 2026.