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When to Plant Napa Cabbage in Morrow County, OH

Napa cabbage forms tall, barrel-shaped heads with tender, crinkled leaves and a mild, slightly sweet flavor. It is the primary cabbage used for kimchi.

Morrow County, Ohio is in USDA Zone 5b. The average last spring frost is April 29 and the first fall frost is October 15, giving you a growing season of approximately 169 days.

At an elevation of 800 feet, Morrow County receives approximately 34.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87ยฐF, providing good warmth for Napa Cabbage during the growing season.

Morrow County, OH (Zone 5b) Moderate season
169 days
Last Spring Frost April 29
169 growing days
First Fall Frost October 15

Morrow County Soil Profile

Soil Type

Silt Loam

Soil pH

6-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (74 days to spare)
Start indoors: Mar 22 Transplant: Apr 26 🍅 Harvest: Jun 21 – Jul 26
Recommended (50%) ✓ Fits season (78 days to spare)
Start indoors: Mar 25 Transplant: Apr 29 🍅 Harvest: Jun 24 – Jul 29
Safe Start (90%) ✓ Fits season (73 days to spare)
Start indoors: Apr 11 Transplant: May 16 🍅 Harvest: Jul 11 – Aug 15

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
1.5″/week
Rainfall provides
0.9″/week
You supply
0.7″/week
Watering frequency 1-2 times/week
Season total 978 gal / 100 sq ft
Napa Cabbage needs ~991 GDD — county provides 2,577 GDD Excellent fit

Napa Cabbage Planting Timeline โ€” Morrow County, OH

Napa Cabbage Planting Calendar

Activity When Date Range
Start Indoors March 25 Mar 25 โ€“ Apr 8
Transplant Outdoors April 29 Apr 29 โ€“ May 13
Direct Sow April 15 Apr 15 โ€“ May 6
Fall Sowing August 6 Aug 6 โ€“ Aug 20
Harvest June 24 Jun 24 โ€“ Jul 29

Plant 1" deep ยท 15" apart ยท Rows 24" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

High โ€” keep soil consistently moist

Days to Maturity

55โ€“75 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 5b

Growing Season

169 days

Growing Tips for Morrow County

Best grown as a fall crop. Direct sow in late summer, 60-70 days before first frost. Keep soil evenly moist. Bolt-resistant varieties are available for spring planting.

Companion Planting

Good Companions

Avoid Planting Near

  • Strawberries

Level Up Your Garden

Frequently Asked Questions

When should I plant Napa Cabbage in Morrow County, OH?

Morrow County is in Zone 5b with an average last frost of April 29. Plan your Napa Cabbage planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Morrow County, OH?

Morrow County, Ohio is in USDA Hardiness Zone 5b. The average last spring frost is April 29 and first fall frost is October 15.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Morrow County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.

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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 Morrow County, OH. Local conditions may vary. Last updated: April 2026.