For pre germination, the bittergourd seeds should be soaked in water for 24 hours. Then soaked seeds is to be mixed with double the volume of moist sand and seed should be fully covered by the sand and keep it for three days. During this period moisture of sand should be maintained. Bitter Gourd or Bitter Melon usually takes a long time to germinate almost about 10-15 days. So to aid the process, I do the following and it always works. Take a pin and slightly crack the seed open or take a pair of pliers and slowly crack open the thinner end of the seed.