When to plant Comfrey in Caroline County, MD
Caroline County's 214-day season only supports one Comfrey planting per year. Sow between April 11 and April 25 for the best chance at full maturity before November 4.
When to Plant Comfrey in Caroline County, MD
Top priorities for Caroline County, Maryland gardeners in June
Your Caroline County, Maryland garden is entering a new phase. Here's what's on the schedule for June and why each task matters now.
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Start harvesting comfrey
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
July will be here before you know it — start on
- First harvests: comfrey
Comfrey is a vigorous perennial herb valued as a dynamic accumulator of nutrients. Its leaves make excellent mulch, compost activator, and liquid fertilizer.
Caroline County, Maryland is in USDA Zone 7b. The average last spring frost is April 4 and the first fall frost is November 4, giving you a growing season of approximately 214 days.
At an elevation of 469 feet, Caroline County receives approximately 40.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 88°F, providing good warmth for Comfrey during the growing season.
Caroline County Soil Profile
Soil Type
Silt Loam
Soil pH
5.3-6.8
Drainage
Well Drained
Comfrey Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Caroline County
How your county's soil matches Comfrey's growing requirements.
Soil pH
Your soil pH (5.3–6.8) overlaps with Comfrey's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Caroline County is excellent for Comfrey — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Comfrey.
Organic Matter
Organic matter is moderate (3.2%). Annual compost additions will help Comfrey.
How to Plant Comfrey
Succession Planting Comfrey
Sow every 6.9 weeks. Last sowing by Aug 06 to harvest before frost.
Comfrey Water Budget
Monthly Watering Guide for Comfrey
Comfrey needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Comfrey Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.6" | 0" | ❄️ Dormant |
| Feb | — | 2.4" | 0" | ❄️ Dormant |
| Mar | — | 3.3" | 0" | ❄️ Dormant |
| Apr | 4.3" | 4" | 0.3" | 💧 Light watering |
| May | 4.3" | 3.8" | 0.5" | 💧 Light watering |
| Jun | 4.3" | 4" | 0.3" | 💧 Light watering |
| Jul | 4.3" | 4.1" | 0.2" | 💧 Light watering |
| Aug | 4.3" | 3.5" | 0.8" | 💧 Light watering |
| Sep | 4.3" | 3.2" | 1.1" | 💧 Light watering |
| Oct | 4.3" | 3.4" | 0.9" | 💧 Light watering |
| Nov | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| Dec | — | 2.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Caroline County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Comfrey Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Comfrey Planting Timeline — Caroline County, MD
Comfrey Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 11 | Apr 11 – Apr 25 |
| Harvest | June 13 | Jun 13 – Aug 22 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · Natural rainfall sufficient
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 7b
📆 Growing Season
214 days in Caroline County
Growing Tips for Comfrey in Caroline County
Direct sow Comfrey outdoors after April 04 in Caroline County when soil has warmed and frost danger has passed.
General growing tips
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 Caroline County, MD?
Caroline County is in Zone 7b with an average last frost of April 4. Plan your Comfrey planting based on this frost date — see the calendar above for exact timing.
What planting zone is Caroline County, MD?
Caroline County, Maryland is in USDA Hardiness Zone 7b. The average last spring frost is April 4 and first fall frost is November 4.
When should I plant Comfrey in Caroline County, MD?
In Caroline County, MD, plant Comfrey after the last frost (around April 4) and before the first frost (around November 4). Best results when soil holds above 50°F.
What growing zone is Caroline County, MD for Comfrey?
Caroline County sits in USDA Zone 7b. Comfrey grows reliably in zones 3a through 9b, so it's a good fit here.
Can Comfrey grow in Caroline County's climate?
Yes — Comfrey grows well in Caroline County's temperate climate. Caroline County averages a 214-day frost-free season, with last frost around April 4 and first frost around November 4.
Your Caroline County Garden Planner — Free
A 22-page printable planner built for Caroline County (Zone 7b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.