When to plant Sunchoke in Koochiching County, MN
In Koochiching County, Sunchoke is a spring-only crop. Plant June 5–June 19 once soil hits 50°F.
When to Plant Sunchoke in Koochiching County, MN
Sunchokes (Jerusalem artichokes) are a native sunflower relative grown for their knobby, nutty-flavored tubers. They are extremely productive and nearly impossible to eradicate.
Koochiching County, Minnesota is in USDA Zone 3b. The average last spring frost is May 22 and the first fall frost is September 18, giving you a growing season of approximately 119 days.
At an elevation of 508 feet, Koochiching County receives approximately 41.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 79°F, so choose short-season varieties of Sunchoke to ensure they mature before fall.
Koochiching County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Sunchoke Planting Timeline — Koochiching County, MN
Sunchoke Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | June 5 | Jun 5 – Jun 19 |
| Harvest | September 25 | Sep 25 – Oct 9 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | — |
| June | Transplant Outdoors |
| July | — |
| August | — |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
110–150 days
🧪 Soil pH
Needs 6–7.5 · Your soil: N/A
🗺️ USDA Zone
Zone 3b
📆 Growing Season
119 days in Koochiching County
Growing Tips for Koochiching County
Plant tubers 4 inches deep in early spring. Contain plants with barriers as they spread aggressively. Harvest after frost or leave in ground and dig as needed through winter.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Sunchoke in Other Locations
Frequently Asked Questions
When should I plant Sunchoke in Koochiching County, MN?
Koochiching County is in Zone 3b with an average last frost of May 22. Plan your Sunchoke planting based on this frost date — see the calendar above for exact timing.
What planting zone is Koochiching County, MN?
Koochiching County, Minnesota is in USDA Hardiness Zone 3b. The average last spring frost is May 22 and first fall frost is September 18.
When should I plant Sunchoke in Koochiching County, MN?
In Koochiching County, MN, plant Sunchoke after the last frost (around May 22) and before the first frost (around September 18). Best results when soil holds above 50°F.
What growing zone is Koochiching County, MN for Sunchoke?
Koochiching County sits in USDA Zone 3b. Sunchoke grows reliably in zones 3a through 9b, so it's a good fit here.
Can Sunchoke grow in Koochiching County's climate?
Yes — Sunchoke grows well in Koochiching County's temperate climate. Koochiching County averages a 119-day frost-free season, with last frost around May 22 and first frost around September 18.
Your Koochiching County Garden Planner — Free
A 22-page printable planner built for Koochiching County (Zone 3b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.