When to plant Mint in Delta County, MI
Delta County's 155-day season only supports one Mint planting per year. Sow between May 19 and June 2 for the best chance at full maturity before October 14.
When to Plant Mint in Delta County, MI
Mint is a vigorous perennial herb with refreshing, aromatic leaves used in teas, cocktails, and cooking. It spreads aggressively by underground runners.
Delta County, Michigan is in USDA Zone 5a. The average last spring frost is May 12 and the first fall frost is October 14, giving you a growing season of approximately 155 days.
At an elevation of 921 feet, Delta County receives approximately 41.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Mint to ensure they mature before fall.
Delta County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Mint Planting Timeline — Delta County, MI
Mint Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 19 | May 19 – Jun 2 |
| Harvest | July 21 | Jul 21 – Sep 29 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | Transplant Outdoors |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
High — keep soil consistently moist
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 5a
📆 Growing Season
155 days in Delta County
Growing Tips for Delta County
Always grow mint in containers or with underground barriers to control spreading. Harvest regularly to keep plants compact. Cut plants back in late summer for a fresh fall flush.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Mint in Other Locations
Frequently Asked Questions
When should I plant Mint in Delta County, MI?
Delta County is in Zone 5a with an average last frost of May 12. Plan your Mint planting based on this frost date — see the calendar above for exact timing.
What planting zone is Delta County, MI?
Delta County, Michigan is in USDA Hardiness Zone 5a. The average last spring frost is May 12 and first fall frost is October 14.
When should I plant Mint in Delta County, MI?
In Delta County, MI, plant Mint after the last frost (around May 12) and before the first frost (around October 14). Best results when soil holds above 50°F.
What growing zone is Delta County, MI for Mint?
Delta County sits in USDA Zone 5a. Mint grows reliably in zones 3a through 10b, so it's a good fit here.
Can Mint grow in Delta County's climate?
Yes — Mint grows well in Delta County's temperate climate. Delta County averages a 155-day frost-free season, with last frost around May 12 and first frost around October 14.
Your Delta County Garden Planner — Free
A 22-page printable planner built for Delta 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.