When to plant Cumin in Shelby County, IA
For Cumin in Shelby County, the safe spring window opens around April 16 and closes around May 7. Last expected frost is April 30, first fall frost October 3, giving a 156-day growing season. A second sowing from July 25 to August 8 extends the harvest into fall.
When to Plant Cumin in Shelby County, IA
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.
Shelby County, Iowa is in USDA Zone 5a. The average last spring frost is April 30 and the first fall frost is October 3, giving you a growing season of approximately 156 days.
At an elevation of 1,113 feet, Shelby County receives approximately 30.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Cumin during the growing season.
Shelby County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Cumin Planting Timeline — Shelby County, IA
Cumin Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 26 | Mar 26 – Apr 9 |
| Transplant Outdoors | April 23 | Apr 23 – May 7 |
| Direct Sow | April 16 | Apr 16 – May 7 |
| Harvest | August 6 | Aug 6 – Oct 8 |
| Fall Sowing | July 25 | Jul 25 – Aug 8 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing |
| August | Fall Sowing Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Low — drought tolerant
📅 Days to Maturity
100–120 days
🧪 Soil pH
Needs 6–8 · Your soil: N/A
🗺️ USDA Zone
Zone 5a
📆 Growing Season
156 days in Shelby County
Growing Tips for Shelby 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
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Cumin in Other Locations
Frequently Asked Questions
When should I plant Cumin in Shelby County, IA?
Shelby County is in Zone 5a with an average last frost of April 30. Plan your Cumin planting based on this frost date — see the calendar above for exact timing.
What planting zone is Shelby County, IA?
Shelby County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is April 30 and first fall frost is October 3.
When should I plant Cumin in Shelby County, IA?
In Shelby County, IA, plant Cumin after the last frost (around April 30) and before the first frost (around October 3). Best results when soil holds above 50°F.
What growing zone is Shelby County, IA for Cumin?
Shelby County sits in USDA Zone 5a. Cumin grows reliably in zones 5a through 11b, so it's a good fit here.
Can Cumin grow in Shelby County's climate?
Yes — Cumin grows well in Shelby County's temperate climate. Shelby County averages a 156-day frost-free season, with last frost around April 30 and first frost around October 3.
Your Shelby County Garden Planner — Free
A 22-page printable planner built for Shelby County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.