When to Plant Sunchoke in Montmorency 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.
Montmorency County, Michigan is in USDA Zone 4b. The average last spring frost is May 19 and the first fall frost is October 1, giving you a growing season of approximately 135 days.
At an elevation of 1,107 feet, Montmorency County receives approximately 40.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Sunchoke to ensure they mature before fall.
Montmorency County Soil Profile
Soil Type
Silt Loam
Soil pH
6.1-6.8
Drainage
Well Drained
Plant Planting Risk Windows
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
Sunchoke Planting Timeline — Montmorency County, MI
Sunchoke Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | June 2 | Jun 2 – Jun 16 |
| Harvest | September 22 | Sep 22 – Oct 27 |
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
6 – 7.5
USDA Zone
Zone 4b
Growing Season
135 days
Growing Tips for Montmorency 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
Level Up Your Garden
Sunchoke in Other Locations
Frequently Asked Questions
When should I plant Sunchoke in Montmorency County, MI?
Montmorency County is in Zone 4b with an average last frost of May 19. Plan your Sunchoke planting based on this frost date — see the calendar above for exact timing.
What planting zone is Montmorency County, MI?
Montmorency County, Michigan is in USDA Hardiness Zone 4b. The average last spring frost is May 19 and first fall frost is October 1.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Montmorency County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.
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