Congo Watermelon Seeds. Congo Heirloom is a watermelon variety that has one of the highest sugar contents of any watermelon! Congo produces large cylindrical fruit with blunt ends ranging in weight from 14 to 23 kg! The rind is medium green in color with dark-green stripes and thick and tough.
The high quality flesh is firm, medium red and sweet with sugar tests up to 9.5%. Average: 85 days.
Growing Congo Watermelon from Seed
Indoor Sowing: Not Recommended
Direct Sowing: Spring and Early Summer.
- You can direct sow the seeds from the beginning of Spring to the beginning of Summer.
- Watermelons grow best on sandy loam soils, with good drainage and a soil pH of between 6.0 and 6.8.
- Soil temperature should be at least 18°C for germination to take place.
- Seeds should be sown in an area that gets full sun.
- Direct sow the seeds 2.5cm deep and 50 – 75cm apart, in soil mounds or ridges.
- You need at least three months of reliably hot, sunny weather to grow and ripen a watermelon. During that time your average daily maximum temperature should be at least about 20-25°C











