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When to Plant Cumin in Tompkins County, NY

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.

Tompkins County, New York is in USDA Zone 5b. The average last spring frost is May 10 and the first fall frost is October 11, giving you a growing season of approximately 154 days.

At an elevation of 309 feet, Tompkins County receives approximately 40.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87ยฐF, providing good warmth for Cumin during the growing season.

Tompkins County, NY (Zone 5b) Moderate season
154 days
Last Spring Frost May 10
154 growing days
First Fall Frost October 11

Tompkins County Soil Profile

Soil Type

Silt Loam

Soil pH

5.2-6.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: Mar 27 Transplant: Apr 24 🍅 Harvest: Aug 7 – Oct 9
Recommended (50%) ✗ May not fit
Start indoors: Apr 5 Transplant: May 3 🍅 Harvest: Aug 16 – Oct 18
Safe Start (90%) ✓ Fits season (1 days to spare)
Start indoors: Apr 16 Transplant: May 14 🍅 Harvest: Aug 27 – Oct 29

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
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Cumin needs ~1,678 GDD — county provides 2,348 GDD Excellent fit

Cumin Planting Timeline โ€” Tompkins County, NY

Cumin Planting Calendar

Activity When Date Range
Start Indoors April 5 Apr 5 โ€“ Apr 19
Transplant Outdoors May 3 May 3 โ€“ May 17
Direct Sow April 26 Apr 26 โ€“ May 17
Fall Sowing August 2 Aug 2 โ€“ Aug 16
Harvest August 16 Aug 16 โ€“ Oct 18

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Start Indoors Direct Sow
May Transplant Outdoors Direct Sow
June โ€”
July โ€”
August Fall Sowing Harvest
September Harvest
October Harvest
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 5b

Growing Season

154 days

Growing Tips for Tompkins 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 Tompkins County, NY?

Tompkins County is in Zone 5b with an average last frost of May 10. Plan your Cumin planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Tompkins County, NY?

Tompkins County, New York is in USDA Hardiness Zone 5b. The average last spring frost is May 10 and first fall frost is October 11.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Tompkins County gardeners in Zone 5b 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 Tompkins County, NY. Local conditions may vary. Last updated: April 2026.