When to plant Sunchoke in Cass County, MI
Cass County's 171-day season only supports one Sunchoke planting per year. Sow between May 13 and May 27 for the best chance at full maturity before October 17.
When to Plant Sunchoke in Cass County, MI
Sunchokes (Jerusalem artichokes) are a native sunflower relative grown for their knobby, nutty-flavored tubers. They are extremely productive and nearly impossible to eradicate.
Cass County, Michigan is in USDA Zone 6a. The average last spring frost is April 29 and the first fall frost is October 17, giving you a growing season of approximately 171 days.
At an elevation of 1,030 feet, Cass County receives approximately 34.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Sunchoke during the growing season.
Cass County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Sunchoke Planting Timeline — Cass County, MI
Sunchoke Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 13 | May 13 – May 27 |
| Harvest | September 2 | Sep 2 – Oct 28 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | — |
| 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 6a
📆 Growing Season
171 days in Cass County
Growing Tips for Cass 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 Cass County, MI?
Cass County is in Zone 6a with an average last frost of April 29. Plan your Sunchoke planting based on this frost date — see the calendar above for exact timing.
What planting zone is Cass County, MI?
Cass County, Michigan is in USDA Hardiness Zone 6a. The average last spring frost is April 29 and first fall frost is October 17.
When should I plant Sunchoke in Cass County, MI?
In Cass County, MI, plant Sunchoke after the last frost (around April 29) and before the first frost (around October 17). Best results when soil holds above 50°F.
What growing zone is Cass County, MI for Sunchoke?
Cass County sits in USDA Zone 6a. Sunchoke grows reliably in zones 3a through 9b, so it's a good fit here.
Can Sunchoke grow in Cass County's climate?
Yes — Sunchoke grows well in Cass County's temperate climate. Cass County averages a 171-day frost-free season, with last frost around April 29 and first frost around October 17.
Your Cass County Garden Planner — Free
A 22-page printable planner built for Cass County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.