Winter melon requires a long growing season and ripens in late autumn. Due to its size, winter melon is not trellised but usually allowed to spread over the ground. Akin to most other cucurbits, it is susceptible to spider mites, aphids, nematodes and viruses. You may directly sow the seeds in a sunny location of the garden when the soil has warmed to over 60 F. (15 C.). Or they can be germinated in individual peat pots or seed flats after abrading the seed covering slightly, keeping the soil moist until the plant has sprouted. Transplant into the garden after five to six leaves have appeared.
Read more at Gardening Know How: What Is A Winter Melon: Winter Melon Wax Gourd Info https://www.gardeningknowhow.com/edible/vegetables/winter-melon/winter-melon-wax-gourd-info.htm