When to plant Comfrey in Antrim County, MI
Antrim County's short 158-day growing season means one Comfrey planting between May 15 and May 29. No fall crop in Zone 5b.
When to Plant Comfrey in Antrim County, MI
Comfrey is a vigorous perennial herb valued as a dynamic accumulator of nutrients. Its leaves make excellent mulch, compost activator, and liquid fertilizer.
Antrim County, Michigan is in USDA Zone 5b. The average last spring frost is May 8 and the first fall frost is October 13, giving you a growing season of approximately 158 days.
At an elevation of 1,039 feet, Antrim County receives approximately 34.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Comfrey to ensure they mature before fall.
Antrim County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Comfrey Planting Timeline — Antrim County, MI
Comfrey Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 15 | May 15 – May 29 |
| Harvest | July 17 | Jul 17 – Sep 25 |
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
Moderate — regular watering
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 5b
📆 Growing Season
158 days in Antrim County
Growing Tips for Antrim County
Plant root cuttings 2 inches deep. Choose Bocking 14 variety to prevent self-seeding. Cut leaves 3-4 times per season for mulch or compost. Avoid planting near pathways as it spreads.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Comfrey in Other Locations
Frequently Asked Questions
When should I plant Comfrey in Antrim County, MI?
Antrim County is in Zone 5b with an average last frost of May 8. Plan your Comfrey planting based on this frost date — see the calendar above for exact timing.
What planting zone is Antrim County, MI?
Antrim County, Michigan is in USDA Hardiness Zone 5b. The average last spring frost is May 8 and first fall frost is October 13.
When should I plant Comfrey in Antrim County, MI?
In Antrim County, MI, plant Comfrey after the last frost (around May 8) and before the first frost (around October 13). Best results when soil holds above 50°F.
What growing zone is Antrim County, MI for Comfrey?
Antrim County sits in USDA Zone 5b. Comfrey grows reliably in zones 3a through 9b, so it's a good fit here.
Can Comfrey grow in Antrim County's climate?
Yes — Comfrey grows well in Antrim County's temperate climate. Antrim County averages a 158-day frost-free season, with last frost around May 8 and first frost around October 13.
Your Antrim County Garden Planner — Free
A 22-page printable planner built for Antrim County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.