When to plant Kabocha in Benton County, IA
Plant Kabocha in Benton County from May 5 to May 26 in spring. Benton County sits in USDA Zone 5a, with last frost around April 28 and first frost on October 9.
When to Plant Kabocha in Benton County, IA
Kabocha is a Japanese winter squash with an exceptionally sweet, dense, chestnut-like flesh and dark green skin. It is a favorite in Asian cuisine for its rich, dry texture.
Benton County, Iowa is in USDA Zone 5a. The average last spring frost is April 28 and the first fall frost is October 9, giving you a growing season of approximately 164 days.
At an elevation of 1,230 feet, Benton County receives approximately 36 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Kabocha during the growing season.
Benton County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Kabocha Planting Timeline — Benton County, IA
Kabocha Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 24 | Mar 24 – Apr 7 |
| Transplant Outdoors | May 12 | May 12 – May 26 |
| Direct Sow | May 5 | May 5 – May 26 |
| Harvest | August 11 | Aug 11 – Sep 8 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | — |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
85–100 days
🧪 Soil pH
Needs 6–7.5 · Your soil: N/A
🗺️ USDA Zone
Zone 5a
📆 Growing Season
164 days in Benton County
Growing Tips for Benton County
Direct sow after frost or start indoors. Harvest when the skin is hard and dull. The stem should be dry and corky. Stores well for 3-4 months in a cool, dry place.
Companion Planting
Good Companions
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Kabocha in Other Locations
Frequently Asked Questions
When should I plant Kabocha in Benton County, IA?
Benton County is in Zone 5a with an average last frost of April 28. Plan your Kabocha planting based on this frost date — see the calendar above for exact timing.
What planting zone is Benton County, IA?
Benton County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is April 28 and first fall frost is October 9.
When should I plant Kabocha in Benton County, IA?
In Benton County, IA, plant Kabocha after the last frost (around April 28) and before the first frost (around October 9). Best results when soil holds above 50°F.
What growing zone is Benton County, IA for Kabocha?
Benton County sits in USDA Zone 5a. Kabocha grows reliably in zones 3a through 11b, so it's a good fit here.
Can Kabocha grow in Benton County's climate?
Yes — Kabocha grows well in Benton County's temperate climate. Benton County averages a 164-day frost-free season, with last frost around April 28 and first frost around October 9.
Your Benton County Garden Planner — Free
A 22-page printable planner built for Benton 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.