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When to Plant Bitter Melon in Clermont County, OH

Bitter melon is a tropical vine producing warty, bitter fruits used in Asian and Indian cuisine. The intense bitterness is prized for its culinary and health properties.

Clermont County, Ohio is in USDA Zone 6a. The average last spring frost is April 17 and the first fall frost is October 22, giving you a growing season of approximately 188 days.

At an elevation of 798 feet, Clermont County receives approximately 30.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89ยฐF, providing good warmth for Bitter Melon during the growing season.

Clermont County, OH (Zone 6a) Moderate season
188 days
Last Spring Frost April 17
188 growing days
First Fall Frost October 22

Clermont County Soil Profile

Soil Type

Silt Loam

Soil pH

5.9-7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (70 days to spare)
Start indoors: Feb 14 Transplant: Apr 25 🍅 Harvest: Jun 27 – Aug 8
Recommended (50%) ✓ Fits season (69 days to spare)
Start indoors: Feb 20 Transplant: May 1 🍅 Harvest: Jul 3 – Aug 14
Safe Start (90%) ✓ Fits season (65 days to spare)
Start indoors: Mar 12 Transplant: May 21 🍅 Harvest: Jul 23 – Sep 3

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
0.7″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 635 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Bitter Melon needs ~1,256 GDD — county provides 3,149 GDD Excellent fit

Bitter Melon Planting Timeline โ€” Clermont County, OH

Bitter Melon Planting Calendar

Activity When Date Range
Start Indoors February 20 Feb 20 โ€“ Mar 6
Transplant Outdoors May 1 May 1 โ€“ May 15
Direct Sow April 24 Apr 24 โ€“ May 15
Harvest July 3 Jul 3 โ€“ Aug 14

Plant 1" deep ยท 30" apart ยท Rows 42" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“90 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6a

Growing Season

188 days

Growing Tips for Clermont County

Start seeds indoors 4 weeks before last frost. Provide a trellis for climbing. Harvest fruits while still green and firm. Reduce bitterness by salting sliced fruit before cooking.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Bitter Melon in Clermont County, OH?

Clermont County is in Zone 6a with an average last frost of April 17. Plan your Bitter Melon planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Clermont County, OH?

Clermont County, Ohio is in USDA Hardiness Zone 6a. The average last spring frost is April 17 and first fall frost is October 22.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Clermont County gardeners in Zone 6a 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 Clermont County, OH. Local conditions may vary. Last updated: April 2026.