When to Plant Mint in Hardin County, OH
Mint is a vigorous perennial herb with refreshing, aromatic leaves used in teas, cocktails, and cooking. It spreads aggressively by underground runners.
Hardin County, Ohio is in USDA Zone 6a. The average last spring frost is April 26 and the first fall frost is October 20, giving you a growing season of approximately 177 days.
At an elevation of 935 feet, Hardin County receives approximately 30.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Mint during the growing season.
Hardin County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Mint Planting Timeline — Hardin County, OH
Mint Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 3 | May 3 – May 17 |
| Harvest | July 5 | Jul 5 – Sep 13 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | — |
| 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 6a
📆 Growing Season
177 days in Hardin County
Growing Tips for Hardin 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 Hardin County, OH?
Hardin County is in Zone 6a with an average last frost of April 26. Plan your Mint planting based on this frost date — see the calendar above for exact timing.
What planting zone is Hardin County, OH?
Hardin County, Ohio is in USDA Hardiness Zone 6a. The average last spring frost is April 26 and first fall frost is October 20.
Your Hardin County Garden Planner — Free
A 22-page printable planner built for Hardin 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.