When to plant Comfrey in Carroll County, MD
In Carroll County, Comfrey is a single-season spring crop — there's no second fall window. Plant April 24–May 8 for an 60–90-day harvest, finishing well before the October 26 first frost.
When to Plant Comfrey in Carroll County, MD
Comfrey is a vigorous perennial herb valued as a dynamic accumulator of nutrients. Its leaves make excellent mulch, compost activator, and liquid fertilizer.
Carroll County, Maryland is in USDA Zone 7a. The average last spring frost is April 17 and the first fall frost is October 26, giving you a growing season of approximately 192 days.
At an elevation of 715 feet, Carroll County receives approximately 42.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Comfrey during the growing season.
Carroll County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Comfrey Planting Timeline — Carroll County, MD
Comfrey Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 24 | Apr 24 – May 8 |
| Harvest | June 26 | Jun 26 – Sep 4 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | Transplant Outdoors |
| June | Harvest |
| 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 7a
📆 Growing Season
192 days in Carroll County
Growing Tips for Carroll 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 Carroll County, MD?
Carroll County is in Zone 7a with an average last frost of April 17. Plan your Comfrey planting based on this frost date — see the calendar above for exact timing.
What planting zone is Carroll County, MD?
Carroll County, Maryland is in USDA Hardiness Zone 7a. The average last spring frost is April 17 and first fall frost is October 26.
When should I plant Comfrey in Carroll County, MD?
In Carroll County, MD, plant Comfrey after the last frost (around April 17) and before the first frost (around October 26). Best results when soil holds above 50°F.
What growing zone is Carroll County, MD for Comfrey?
Carroll County sits in USDA Zone 7a. Comfrey grows reliably in zones 3a through 9b, so it's a good fit here.
Can Comfrey grow in Carroll County's climate?
Yes — Comfrey grows well in Carroll County's temperate climate. Carroll County averages a 192-day frost-free season, with last frost around April 17 and first frost around October 26.
Your Carroll County Garden Planner — Free
A 22-page printable planner built for Carroll County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.