When should I plant Bitter Gourd in Zone 4b?

Start Bitter Gourd seeds indoors around Apr 3. Transplant outdoors after May 15. Expect first harvest around Aug 13.

What is the last frost date for Zone 4b?

The average last spring frost date for Zone 4b is May 1. The first fall frost averages Oct 5, giving a 157-day growing season.

Can I grow Bitter Gourd in Zone 4b?

Yes. Bitter Gourd needs 55 days to harvest. Zone 4b has a 157-day growing season, which is sufficient.

Growing Bitter Gourd in Zone 4b

Zone 4b has cold winters and a moderate growing season. Timing is key for Bitter Gourd in this zone. Last frost: May 1. First frost: Oct 5.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 3Oct 5

Season: May 1 – Oct 5 (157 days)

Zone4b

Last FrostMay 1

First FrostOct 5

Season Length157 days

Days to Harvest55

SunFull Sun

Frost ToleranceNone

Spacing2/sqft (6-8" apart)

When to Plant Bitter Gourd in Zone 4b

Start Seeds Indoors: Apr 3

Start Bitter Gourd seeds indoors around Apr 3 (4 weeks before last frost). Optimal germination temperature: 85°F. Germinates in 7–14 days.

Transplant Outdoors: May 15

Transplant Bitter Gourd seedlings outdoors after May 15. Wait until soil temperature reaches 65°F. Space plants at 2/sqft (6-8" apart). Harden off plants for a week before moving outside.

Harvest: Aug 13

First harvest approximately Aug 13 (~90 days from transplant). Continue harvesting until first frost (Oct 5).

Bitter Gourd in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Plan Your Bitter Gourd Garden

Track Bitter Gourd from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Bitter Gourd Growing Guide