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When to Plant Bitter Melon in Calhoun County, TX

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.

Calhoun County, Texas is in USDA Zone 9a. The average last spring frost is February 16 and the first fall frost is December 7, giving you a growing season of approximately 294 days.

At an elevation of 215 feet, Calhoun County receives approximately 59.5 inches of rainfall annually with predominantly loam soil. Summer highs average 99ยฐF, so Bitter Melon may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Bitter Melon root diseases.

Calhoun County, TX (Zone 9a) Year-round
294 days
Last Spring Frost February 16
294 growing days
First Fall Frost December 7

Calhoun County Soil Profile

Soil Type

Loam

Soil pH

6.2-7.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (199 days to spare)
Start indoors: Dec 12 Transplant: Jan 30 🍅 Harvest: Apr 3 – May 15
Recommended (50%) ✓ Fits season (182 days to spare)
Start indoors: Jan 5 Transplant: Feb 23 🍅 Harvest: Apr 27 – Jun 8
Safe Start (90%) ✓ Fits season (173 days to spare)
Start indoors: Jan 27 Transplant: Mar 17 🍅 Harvest: May 19 – Jun 30

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 Calhoun County

How your county's soil matches Bitter Melon's growing requirements.

Soil pH

Your soil pH (6.2โ€“7.8) overlaps with Bitter Melon's range (6.0โ€“7.0), though not a perfect match.

Soil Texture

The loam soil in Calhoun County is excellent for Bitter Melon โ€” good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.2%). Annual compost additions will help Bitter Melon.

How to Plant Bitter Melon

1"
Planting Depth
30"
Between Plants
42"
Between Rows

Succession Planting Bitter Melon

5
successive plantings in your 294-day season

Sow every 6.9 weeks. Last sowing by Sep 08 to harvest before frost.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 401 gal / 100 sq ft

Monthly Watering Guide for Bitter Melon

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

Month Bitter Melon Needs Rainfall You Supplement Action
Jan โ€” 1.4" 0" โ„๏ธ Dormant
Feb 4.3" 2.2" 2.1" ๐Ÿ’ง Light watering
Mar 4.3" 4.6" 0" โœ… Rainfall sufficient
Apr 4.3" 6.7" 0" โœ… Rainfall sufficient
May 4.3" 8.5" 0" โœ… Rainfall sufficient
Jun 4.3" 9.1" 0" โœ… Rainfall sufficient
Jul 4.3" 7.3" 0" โœ… Rainfall sufficient
Aug 4.3" 6.6" 0" โœ… Rainfall sufficient
Sep 4.3" 5.2" 0" โœ… Rainfall sufficient
Oct 4.3" 3.9" 0.4" ๐Ÿ’ง Light watering
Nov 4.3" 2.2" 2.1" ๐Ÿ’ง Light watering
Dec 4.3" 1.9" 2.4" ๐Ÿšฟ Regular watering

Water needs are for active growing months only (Febโ€“Dec in Calhoun County). Supplement amounts are based on average rainfall โ€” actual needs vary with temperature, soil, and mulching.

Bitter Melon 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" โ€” every day above 50ยฐF 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.

Bitter Melon needs ~1,819 GDD — county provides 7,153 GDD Excellent fit

Bitter Melon Planting Timeline โ€” Calhoun County, TX

Bitter Melon Planting Calendar

Activity When Date Range
Start Indoors January 5 Jan 5 โ€“ Jan 19
Transplant Outdoors February 23 Feb 23 โ€“ Mar 9
Direct Sow February 16 Feb 16 โ€“ Mar 9
Harvest April 27 Apr 27 โ€“ Jun 8

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

Month-by-Month Timeline

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

Growing Conditions

โ˜€๏ธ Sun

Full Sun (6-8+ hours)

๐Ÿ’ง Water

1"/week ยท Only during dry spells

๐Ÿ“… Days to Maturity

60โ€“90 days

๐Ÿงช Soil pH

Needs 6โ€“7 ยท Your soil: acceptable

๐Ÿ—บ๏ธ USDA Zone

Zone 9a

๐Ÿ“† Growing Season

294 days in Calhoun County

Growing Tips for Bitter Melon in Calhoun County

Direct sow Bitter Melon outdoors after February 16 in Calhoun County when soil has warmed and frost danger has passed.

With summer highs reaching 99ยฐF in Calhoun County, provide afternoon shade for Bitter Melon and water deeply in the morning.

Common pests for Bitter Melon in this region include squash vine borer and cucumber beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

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

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Bitter Melon in Calhoun County, TX?

Calhoun County is in Zone 9a with an average last frost of February 16. Plan your Bitter Melon planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Calhoun County, TX?

Calhoun County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 16 and first fall frost is December 7.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Calhoun County gardeners in Zone 9a 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 Calhoun County, TX. Local conditions may vary. Last updated: April 2026.