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When to plant Mache in Campbell County, KY

For Mache in Campbell County, the safe spring window opens around April 4 and closes around April 25. Last expected frost is April 18, first fall frost October 24, giving a 189-day growing season. A second sowing from August 15 to August 29 extends the harvest into fall.

When to Plant Mache in Campbell County, KY

Campbell County, Kentucky Zone 6b June

June in the garden — Campbell County, Kentucky

Here's what deserves your attention in Campbell County, Kentucky this month. Everything below is tailored to Zone 6b and timed around your local frost dates.

Avg. last frost April 18
Avg. first frost October 24
Soil temp (4") 64°F
Watering Low
Pest pressure High
Daylight 14.7 hrs
  1. Basket week: mache

    Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.

Before July arrives, get these ready
  • First harvests: mache

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Mache (corn salad) is a cold-hardy salad green with small, rounded, tender leaves and a mild, nutty flavor. It thrives in cool weather and even overwinters in many climates.

Campbell County, Kentucky is in USDA Zone 6b. The average last spring frost is April 18 and the first fall frost is October 24, giving you a growing season of approximately 189 days.

At an elevation of 3,725 feet, Campbell County receives approximately 47.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91°F, providing good warmth for Mache during the growing season.

Campbell County, KY (Zone 6b) Moderate season
189 days
Last Spring Frost April 18
189 growing days
First Fall Frost October 24

Campbell County Soil Profile

Soil Type

Silt Loam

Soil pH

5.6-7

Drainage

Well Drained

Mache Planting Risk Windows

Early Start (70% safe) ✓ Fits season (116 days to spare)
Start indoors: Mar 6 Transplant: Apr 10 🍅 Harvest: May 22 – Jun 26
Recommended (50%) ✓ Fits season (112 days to spare)
Start indoors: Mar 14 Transplant: Apr 18 🍅 Harvest: May 30 – Jul 4
Safe Start (90%) ✓ Fits season (107 days to spare)
Start indoors: Apr 3 Transplant: May 8 🍅 Harvest: Jun 19 – Jul 24

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 Campbell County

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

Soil pH

Your soil pH (5.6–7.0) overlaps with Mache's range (6.0–7.5), though not a perfect match.

Soil Texture

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

Organic Matter

Organic matter is moderate (3.1%). Annual compost additions will help Mache.

How to Plant Mache

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Succession Planting Mache

5
successive plantings in your 189-day season

Sow every 4.6 weeks. Last sowing by Aug 25 to harvest before frost.

For a dedicated fall crop, sow by Aug 15.

Mache Water Budget

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

Monthly Watering Guide for Mache

Mache needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Mache Needs Rainfall You Supplement Action
Jan 4.2" 0" ❄️ Dormant
Feb 4.1" 0" ❄️ Dormant
Mar 4" 0" ❄️ Dormant
Apr 4.3" 3.5" 0.8" 💧 Light watering
May 4.3" 3.5" 0.8" 💧 Light watering
Jun 4.3" 4.3" 0" ✅ Rainfall sufficient
Jul 4.3" 5" 0" ✅ Rainfall sufficient
Aug 4.3" 5.1" 0" ✅ Rainfall sufficient
Sep 4.3" 3.1" 1.2" 💧 Light watering
Oct 4.3" 3.4" 0.9" 💧 Light watering
Nov 3.3" 0" ❄️ Dormant
Dec 4.1" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Oct in Campbell County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Mache 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.

Mache needs ~912 GDD — county provides 3,449 GDD Excellent fit

Mache Planting Timeline — Campbell County, KY

Mache Planting Calendar

Activity When Date Range
Start Indoors March 14 Mar 14 – Mar 28
Transplant Outdoors April 18 Apr 18 – May 2
Direct Sow April 4 Apr 4 – Apr 25
Harvest May 30 May 30 – Jul 4
Fall Sowing August 15 Aug 15 – Aug 29

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January
February
March Start Indoors
April Transplant Outdoors Direct Sow
May Transplant Outdoors Harvest
June Harvest
July Harvest
August Fall Sowing
September
October
November
December

Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

40–60 days

🧪 Soil pH

Needs 6–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 6b

📆 Growing Season

189 days in Campbell County

Growing Tips for Mache in Campbell County

Direct sow Mache outdoors after April 18 in Campbell County when soil has warmed and frost danger has passed.

Your generous 189.0-day season in Campbell County allows multiple plantings of Mache. Sow every 20.0 days for continuous harvest.

General growing tips

Direct sow in early spring or late summer for fall and winter harvest. Seeds need light to germinate so press gently into soil surface. Harvest whole rosettes.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Mache in Campbell County, KY?

Campbell County is in Zone 6b with an average last frost of April 18. Plan your Mache planting based on this frost date — see the calendar above for exact timing.

What planting zone is Campbell County, KY?

Campbell County, Kentucky is in USDA Hardiness Zone 6b. The average last spring frost is April 18 and first fall frost is October 24.

When should I plant Mache in Campbell County, KY?

In Campbell County, KY, plant Mache after the last frost (around April 18) and before the first frost (around October 24). Best results when soil holds above 50°F.

What growing zone is Campbell County, KY for Mache?

Campbell County sits in USDA Zone 6b. Mache grows reliably in zones 2a through 10b, so it's a good fit here.

Can Mache grow in Campbell County's climate?

Yes — Mache grows well in Campbell County's temperate climate. Campbell County averages a 189-day frost-free season, with last frost around April 18 and first frost around October 24.

🌱

Your Campbell County Garden Planner — Free

A 22-page printable planner built for Campbell County (Zone 6b). 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 Campbell County, KY. 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.