Bitter Melon
Momordica charantia • Cucurbitaceae
🌱 Seed Category
Vegetable
🌍 Origin Region
Tropical regions of Asia, commonly cultivated throughout tropical and subtropical parts of Asia, Africa, and the Caribbean
📅 Days to Maturity
55-70 days from direct sowing or transplanting to first harvest. Harvest immature green fruits for culinary use before they turn yellow and split.
🌡️ Hardiness Zones
Typically grown as a warm-season annual across USDA Hardiness Zones 9-11, though can be grown as an annual during summer in Zones 3-8.
About This Seed
Seeds are roughly rectangular or oblong, flattened, about 8-10 mm long, featuring distinct jagged, tooth-like ridges and rough bumpy surface textures along the edges and sides, light to medium brown in color. The resulting plant is a vigorous, climbing vine with deeply lobed leaves and distinctive warty, oblong fruits that turn orange-yellow and split open when fully ripe.
Growing Information
Growing Season
Warm-season crop, plant in late spring after all danger of frost has passed, start indoors 3-4 weeks before last frost or direct sow
Germination
Germinates in 7-14 days at optimal soil temperatures of 75°F to 85°F. Pre-soaking seeds in warm water for 24 hours or lightly filing/scoring the seed coat can significantly improve germination rates. Requires warmth and moisture.
Planting Instructions
Plant 1/2 to 1 inch deep, spaced 12-18 inches apart along sturdy trellises or fences with row spacing of 4-6 feet. Prefers rich, well-draining loamy soil amended with ample organic matter, with a pH range of 6.0 to 6.7.
Sunlight & Water Needs
Requires full sun (at least 6-8 hours of direct sunlight daily). Needs consistent, moderate watering to keep soil evenly moist but not waterlogged. Moderate drought tolerance once established, but yields are best with regular moisture.
Companion Plants
Beneficial companions include corn, sunflowers, and marigolds which can act as natural supports or pest deterrents. Avoid planting heavily competing root crops right underneath the climbing vines.
Special Characteristics
Highly valued for its distinct culinary bitterness and traditional medicinal properties. Produces bright yellow monoecious flowers that attract bees and other pollinators. Shows good resilience in high heat and humidity.