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When to Plant Bitter Melon in Washington County, AL

Washington County, Alabama Zone 8b May

May in Washington County, Alabama — your action list

Your garden in Washington County, Alabama is working on a schedule, even when you're not. Here's where you should be this May.

Avg. last frost March 12
Avg. first frost November 13
Soil temp (4") 74°F
Watering Low
Pest pressure High
Daylight 13.6 hrs
  1. It's harvest week for bitter melon

    This is the payoff month. Bring a basket, bring a friend, and get into the beds.

June will be here before you know it — start on
  • First harvests: bitter melon

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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.

Washington County, Alabama is in USDA Zone 8b. The average last spring frost is March 12 and the first fall frost is November 13, giving you a growing season of approximately 246 days.

At an elevation of 419 feet, Washington County receives approximately 54.8 inches of rainfall annually with predominantly clay loam soil. Summer highs average 97°F, so Bitter Melon may need afternoon shade and extra watering during peak heat. Clay soil retains moisture well for Bitter Melon, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Bitter Melon root diseases.

Washington County, AL (Zone 8b) Long season
246 days
Last Spring Frost March 12
246 growing days
First Fall Frost November 13
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Washington County Soil Profile

Soil Type

Clay Loam

Soil pH

5.3-6.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (128 days to spare)
Start indoors: Jan 13 Transplant: Mar 17 🍅 Harvest: May 19 – Jun 30
Recommended (50%) ✓ Fits season (127 days to spare)
Start indoors: Jan 22 Transplant: Mar 26 🍅 Harvest: May 28 – Jul 9
Safe Start (90%) ✓ Fits season (123 days to spare)
Start indoors: Feb 14 Transplant: Apr 18 🍅 Harvest: Jun 20 – Aug 1

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 Washington County

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

Soil pH

Your soil pH (5.3–6.6) is more acidic than Bitter Melon prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

The clay loam soil in Washington County is excellent for Bitter Melon — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.4%). 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

4
successive plantings in your 246-day season

Sow every 6.9 weeks. Last sowing by Aug 15 to harvest before frost.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 141 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 4.3" 0" ❄️ Dormant
Feb 5.1" 0" ❄️ Dormant
Mar 4.3" 5.4" 0" ✅ Rainfall sufficient
Apr 4.3" 3.7" 0.6" 💧 Light watering
May 4.3" 4.8" 0" ✅ Rainfall sufficient
Jun 4.3" 4.5" 0" ✅ Rainfall sufficient
Jul 4.3" 5.1" 0" ✅ Rainfall sufficient
Aug 4.3" 5.4" 0" ✅ Rainfall sufficient
Sep 4.3" 3.6" 0.7" 💧 Light watering
Oct 4.3" 3" 1.3" 💧 Light watering
Nov 4.3" 4.8" 0" ✅ Rainfall sufficient
Dec 5" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Washington County). Supplement amounts are based on average rainfall — 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" — 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.

Bitter Melon needs ~1,706 GDD — county provides 5,596 GDD Excellent fit

Bitter Melon Planting Timeline — Washington County, AL

Bitter Melon Planting Calendar

Activity When Date Range
Start Indoors January 22 Jan 22 – Feb 5
Transplant Outdoors March 26 Mar 26 – Apr 9
Direct Sow March 19 Mar 19 – Apr 9
Harvest May 28 May 28 – Jul 9

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Only during dry spells

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 8b

📆 Growing Season

246 days in Washington County

Growing Tips for Bitter Melon in Washington County

Direct sow Bitter Melon outdoors after March 12 in Washington County when soil has warmed and frost danger has passed.

With Washington County's clay soil (34% clay), work in 3-4 inches of compost before planting Bitter Melon. Avoid tilling when soil is wet to prevent compaction.

With summer highs reaching 97°F in Washington 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 Washington County, AL?

Washington County is in Zone 8b with an average last frost of March 12. Plan your Bitter Melon planting based on this frost date — see the calendar above for exact timing.

What planting zone is Washington County, AL?

Washington County, Alabama is in USDA Hardiness Zone 8b. The average last spring frost is March 12 and first fall frost is November 13.

🌱

Your Washington County Garden Planner — Free

A 24-page printable planner built for Washington County (Zone 8b). 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 Washington County, AL. Local conditions may vary. Last updated: May 2026.

Sources & credits

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