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When to plant Comfrey in Wexford County, MI

Plant Comfrey in Wexford County during the brief May 24–June 7 window. With 140 frost-free days, fall plantings can't mature before October 4.

When to Plant Comfrey in Wexford County, MI

Wexford County, Michigan Zone 5b June

June to-do list for Wexford County, Michigan

Here's what deserves your attention in Wexford County, Michigan this month. Everything below is tailored to Zone 5b and timed around your local frost dates.

Avg. last frost May 17
Avg. first frost October 4
Soil temp (4") 68°F
Watering Low
Pest pressure High
Daylight 15.3 hrs
To set up a strong July, finish these tasks
  • First harvests: comfrey

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

Wexford County, Michigan is in USDA Zone 5b. The average last spring frost is May 17 and the first fall frost is October 4, giving you a growing season of approximately 140 days.

At an elevation of 1,167 feet, Wexford County receives approximately 35.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Comfrey to ensure they mature before fall.

Wexford County, MI (Zone 5b) Short season
140 days
Last Spring Frost May 17
140 growing days
First Fall Frost October 4

Wexford County Soil Profile

Soil Type

Silt Loam

Soil pH

6.2-6.8

Drainage

Well Drained

Comfrey Planting Risk Windows

Early Start (70% safe) ✓ Fits season (1 days to spare)
Transplant: May 19 🍅 Harvest: Jul 21 – Sep 29
Recommended (50%) ✓ Fits season (0 days to spare)
Transplant: May 24 🍅 Harvest: Jul 26 – Oct 4
Safe Start (90%) ✓ Fits season (6 days to spare)
Transplant: Jun 6 🍅 Harvest: Aug 8 – Oct 17

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 Wexford County

How your county's soil matches Comfrey's growing requirements.

Soil pH

Your soil pH (6.2–6.8) is within Comfrey's preferred range (6.0–7.0).

Soil Texture

The silt loam soil in Wexford County is excellent for Comfrey — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is excellent (4.5%) — Comfrey will thrive.

How to Plant Comfrey

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Succession Planting Comfrey

2
successive plantings in your 140-day season

Sow every 6.9 weeks. Last sowing by Jul 06 to harvest before frost.

Comfrey Water Budget

Plant needs
1.0″/week
Rainfall provides
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

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 1.6" 0" ❄️ Dormant
Feb 1.6" 0" ❄️ Dormant
Mar 2.1" 0" ❄️ Dormant
Apr 3.7" 0" ❄️ Dormant
May 4.3" 4.3" 0" ✅ Rainfall sufficient
Jun 4.3" 4.1" 0.2" 💧 Light watering
Jul 4.3" 4.3" 0" ✅ Rainfall sufficient
Aug 4.3" 3.7" 0.6" 💧 Light watering
Sep 4.3" 3.4" 0.9" 💧 Light watering
Oct 4.3" 2.8" 1.5" 💧 Light watering
Nov 2.1" 0" ❄️ Dormant
Dec 2.2" 0" ❄️ Dormant

Water needs are for active growing months only (May–Oct in Wexford 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 needs ~975 GDD — county provides 1,820 GDD Excellent fit

Comfrey Planting Timeline — Wexford County, MI

Comfrey Planting Calendar

Activity When Date Range
Transplant Outdoors May 24 May 24 – Jun 7
Harvest July 26 Jul 26 – Oct 4

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

Month-by-Month Timeline

MonthActivities
January
February
March
April
May Transplant Outdoors
June Transplant Outdoors
July Harvest
August Harvest
September Harvest
October Harvest
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: ideal

🗺️ USDA Zone

Zone 5b

📆 Growing Season

140 days in Wexford County

Growing Tips for Comfrey in Wexford County

Direct sow Comfrey outdoors after May 17 in Wexford 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 →

Frequently Asked Questions

When should I plant Comfrey in Wexford County, MI?

Wexford County is in Zone 5b with an average last frost of May 17. Plan your Comfrey planting based on this frost date — see the calendar above for exact timing.

What planting zone is Wexford County, MI?

Wexford County, Michigan is in USDA Hardiness Zone 5b. The average last spring frost is May 17 and first fall frost is October 4.

When should I plant Comfrey in Wexford County, MI?

In Wexford County, MI, plant Comfrey after the last frost (around May 17) and before the first frost (around October 4). Best results when soil holds above 50°F.

What growing zone is Wexford County, MI for Comfrey?

Wexford County sits in USDA Zone 5b. Comfrey grows reliably in zones 3a through 9b, so it's a good fit here.

Can Comfrey grow in Wexford County's climate?

Yes — Comfrey grows well in Wexford County's temperate climate. Wexford County averages a 140-day frost-free season, with last frost around May 17 and first frost around October 4.

🌱

Your Wexford County Garden Planner — Free

A 22-page printable planner built for Wexford County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.