When to Plant Comfrey in Windsor-Essex, ON
Comfrey is a vigorous perennial herb valued as a dynamic accumulator of nutrients. Its leaves make excellent mulch, compost activator, and liquid fertilizer.
Windsor-Essex, Ontario is in USDA Zone 8a. The average last spring frost is March 26 and the first fall frost is November 1, giving you a growing season of approximately 220 days.
At an elevation of 623 feet, Windsor-Essex receives approximately 41.8 inches of rainfall annually with predominantly clay loam soil. Summer highs average 90°F, providing good warmth for Comfrey during the growing season. Clay soil retains moisture well for Comfrey, but amend with compost to improve drainage and prevent root rot.
Windsor-Essex Soil Profile
Soil Type
Clay Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Comfrey Planting Timeline — Windsor-Essex, ON
Comfrey Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 2 | Apr 2 – Apr 16 |
| Harvest | June 4 | Jun 4 – Aug 13 |
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
Moderate — regular watering
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 8a
📆 Growing Season
220 days in Windsor-Essex
Growing Tips for Windsor-Essex
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 Windsor-Essex, ON?
Windsor-Essex is in Zone 8a with an average last frost of March 26. Plan your Comfrey planting based on this frost date — see the calendar above for exact timing.
What planting zone is Windsor-Essex, ON?
Windsor-Essex, Ontario is in USDA Hardiness Zone 8a. The average last spring frost is March 26 and first fall frost is November 1.
Your Windsor-Essex Garden Planner — Free
A 22-page printable planner built for Windsor-Essex (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.