2g 20 seeds Vietnamese Sophia Hybrid Smooth Luffa; Hạt giống mướp hương 2g 20 seeds Vietnamese Sophia Hybrid Smooth Luffa; Hạt giống mướp hương lai F1; SOPHIA 404 Rang Dong Seeds are in Rang Dong factory sealed mylar packaging. Best to harvest at 8-10" length, or two weeks after flowering. Luffa gourd seeds are considered difficult to germinate, especially when sowed directly outdoor. We highly recommend soaking the seed in warm water overnight and use heating mat to start seeds indoor. Transplant two weeks after the last frost. Do not transplant too early, as luffa seedlings simply would not grow well in cool temperatures. days.