When to plant Comfrey in Red Lake County, MN
Plant Comfrey in Red Lake County during the brief May 18–June 1 window. With 143 frost-free days, fall plantings can't mature before October 1.
When to Plant Comfrey in Red Lake County, MN
Comfrey is a vigorous perennial herb valued as a dynamic accumulator of nutrients. Its leaves make excellent mulch, compost activator, and liquid fertilizer.
Red Lake County, Minnesota is in USDA Zone 3b. The average last spring frost is May 11 and the first fall frost is October 1, giving you a growing season of approximately 143 days.
At an elevation of 616 feet, Red Lake County receives approximately 36.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80°F, so choose short-season varieties of Comfrey to ensure they mature before fall.
Red Lake County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Comfrey Planting Timeline — Red Lake County, MN
Comfrey Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 18 | May 18 – Jun 1 |
| Harvest | July 20 | Jul 20 – Sep 21 |
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
Moderate — regular watering
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 3b
📆 Growing Season
143 days in Red Lake County
Growing Tips for Red Lake 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 Red Lake County, MN?
Red Lake County is in Zone 3b with an average last frost of May 11. Plan your Comfrey planting based on this frost date — see the calendar above for exact timing.
What planting zone is Red Lake County, MN?
Red Lake County, Minnesota is in USDA Hardiness Zone 3b. The average last spring frost is May 11 and first fall frost is October 1.
When should I plant Comfrey in Red Lake County, MN?
In Red Lake County, MN, plant Comfrey after the last frost (around May 11) and before the first frost (around October 1). Best results when soil holds above 50°F.
What growing zone is Red Lake County, MN for Comfrey?
Red Lake County sits in USDA Zone 3b. Comfrey grows reliably in zones 3a through 9b, so it's a good fit here.
Can Comfrey grow in Red Lake County's climate?
Yes — Comfrey grows well in Red Lake County's temperate climate. Red Lake County averages a 143-day frost-free season, with last frost around May 11 and first frost around October 1.
Your Red Lake County Garden Planner — Free
A 22-page printable planner built for Red Lake County (Zone 3b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.