Bitter Melon Seed
Momordica charantia • Cucurbitaceae
🌱 Seed Category
Vegetable
🌍 Origin Region
Tropical Asia, widely cultivated in India, Southeast Asia, China, and parts of East Africa and South America.
📅 Days to Maturity
55 to 70 days from transplanting to first harvest (or 70-85 days from direct sowing). Fruits should be harvested while still green and tender before they turn yellow and split. Can be harvested continuously over a long period.
🌡️ Hardiness Zones
Typically grown as a warm-season annual across USDA Hardiness Zones 9 through 11. In cooler zones (Zones 4-8), it is cultivated strictly as a summer annual.
About This Seed
Seeds are distinctively shaped, roughly rectangular to oblong with a flattened profile, featuring heavily sculpted, jagged, or tooth-like edges and a wrinkled, pebbled surface texture in golden-brown to tan colors. The resulting plant is a vigorous, tendril-climbing annual vine with deeply lobed, palm-shaped leaves, yellow monoecious flowers, and oblong, warty, edible fruits that turn bright orange-yellow when fully ripe and split open to reveal red-coated seeds.
Growing Information
Growing Season
Spring and Summer. Best sown after all danger of frost has passed when soil temperatures reach 70-85°F. Can be started indoors 3-4 weeks before the last frost or direct sown.
Germination
Germination takes 7 to 14 days at optimal soil temperatures of 75-85°F. Germination rate is moderate (60-80%). Light is not strictly required for germination, but warm temperatures are critical. Nicking the seed coat or soaking seeds in warm water for 24 hours prior to planting can significantly improve and speed up germination.
Planting Instructions
Plant seeds 0.5 to 1 inch deep. Space seeds or seedlings 12 to 18 inches apart along sturdy trellises, arbors, or fences, with row spacing of 3 to 4 feet. Prefers rich, well-draining loamy or sandy soil enriched with organic matter. Optimal soil pH is 6.0 to 6.7.
Sunlight & Water Needs
Requires full sun, ideally 6 to 8 hours of direct sunlight daily. Water consistently to keep soil evenly moist, providing regular deep watering during dry spells. Moderate drought tolerance once established, but regular moisture ensures better fruit production and quality.
Companion Plants
Beneficial companions include corn, beans, and sunflowers which can act as natural supports or provide light shade. Avoid planting near potatoes and strongly aromatic herbs that might compete heavily for soil nutrients.
Special Characteristics
Highly heat-tolerant and thrives in high humidity. Excellent climbing vine suitable for vertical gardening. Fruits are prized in Asian and Indian cuisines for their distinct bitterness and medicinal properties, particularly in blood sugar regulation.