When to plant Comfrey in Merced County County,
Merced County County sits in cold Zone 9a. Plant Comfrey March 3–March 17 for the single annual harvest; the November 28 first frost closes the window.
When to Plant Comfrey in Merced County, CA
Comfrey is a vigorous perennial herb valued as a dynamic accumulator of nutrients. Its leaves make excellent mulch, compost activator, and liquid fertilizer.
Merced County, California is in USDA Zone 9a. The average last spring frost is February 24 and the first fall frost is November 28, giving you a growing season of approximately 277 days.
At an elevation of 269 feet, Merced County receives approximately 18.8 inches of rainfall annually with predominantly loam soil. Summer highs average 87°F, providing good warmth for Comfrey during the growing season. With low rainfall, drip irrigation is essential for growing Comfrey successfully. Mulch heavily to conserve soil moisture.
Merced County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Comfrey Planting Timeline — Merced County, CA
Comfrey Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 3 | Mar 3 – Mar 17 |
| Harvest | May 5 | May 5 – Jul 14 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Transplant Outdoors |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| 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 9a
📆 Growing Season
277 days in Merced County
Growing Tips for Merced 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 Merced County, CA?
Merced County is in Zone 9a with an average last frost of February 24. Plan your Comfrey planting based on this frost date — see the calendar above for exact timing.
What planting zone is Merced County, CA?
Merced County, California is in USDA Hardiness Zone 9a. The average last spring frost is February 24 and first fall frost is November 28.
When should I plant Comfrey in Merced County County, ?
In Merced County County, , plant Comfrey after the last frost (around February 24) and before the first frost (around November 28). Best results when soil holds above 50°F.
What growing zone is Merced County County, for Comfrey?
Merced County County sits in USDA Zone 9a. Comfrey grows reliably in zones 3a through 9b, so it's a good fit here.
Can Comfrey grow in Merced County County's climate?
Yes — Comfrey grows well in Merced County County's temperate climate. Merced County County averages a 278-day frost-free season, with last frost around February 24 and first frost around November 28.
Your Merced County Garden Planner — Free
A 22-page printable planner built for Merced County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.