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When to Plant Comfrey in Stoddard County, MO

Comfrey is a vigorous perennial herb valued as a dynamic accumulator of nutrients. Its leaves make excellent mulch, compost activator, and liquid fertilizer.

Stoddard County, Missouri is in USDA Zone 6b. The average last spring frost is April 7 and the first fall frost is October 28, giving you a growing season of approximately 204 days.

At an elevation of 1,112 feet, Stoddard County receives approximately 40.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90ยฐF, providing good warmth for Comfrey during the growing season.

Stoddard County, MO (Zone 6b) Long season
204 days
Last Spring Frost April 7
204 growing days
First Fall Frost October 28

Stoddard County Soil Profile

Soil Type

Silt Loam

Soil pH

5.4-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (65 days to spare)
Transplant: Apr 5 🍅 Harvest: Jun 7 – Aug 16
Recommended (50%) ✓ Fits season (64 days to spare)
Transplant: Apr 14 🍅 Harvest: Jun 16 – Aug 25
Safe Start (90%) ✓ Fits season (64 days to spare)
Transplant: Apr 28 🍅 Harvest: Jun 30 – Sep 8

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.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.8″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 290 gal / 100 sq ft
Comfrey needs ~1,312 GDD — county provides 3,570 GDD Excellent fit

Comfrey Planting Timeline โ€” Stoddard County, MO

Comfrey Planting Calendar

Activity When Date Range
Transplant Outdoors April 14 Apr 14 โ€“ Apr 28
Harvest June 16 Jun 16 โ€“ Aug 25

Plant 0.5" deep ยท 8" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Transplant Outdoors
May โ€”
June Harvest
July Harvest
August Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“90 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6b

Growing Season

204 days

Growing Tips for Stoddard 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

Level Up Your Garden

Frequently Asked Questions

When should I plant Comfrey in Stoddard County, MO?

Stoddard County is in Zone 6b with an average last frost of April 7. Plan your Comfrey planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Stoddard County, MO?

Stoddard County, Missouri is in USDA Hardiness Zone 6b. The average last spring frost is April 7 and first fall frost is October 28.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Stoddard County gardeners in Zone 6b organize planting dates, track what's growing, and never miss a planting window.

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Free download. Plan your entire garden season in minutes.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Stoddard County, MO. Local conditions may vary. Last updated: April 2026.