What you want to say is melon, which is loofah. Luffa is a kind of millet plant with creeping stems, usually with three to seven leaves and unisexual yellow flowers. The fruit is long and edible when tender. When cooked, there are many reticular fibers on the meat, called loofah, which can be used as medicine to scrub things. My family grows them every year. As for "melon falling", I have never heard of it, only the idiom "ripe melon falling", pedicle: the part where the fruit meets the branch. When the melon is ripe, the pedicle will naturally fall off. Metaphorically, when the conditions are ripe, things will naturally succeed. I wish you good health and a happy life. Goodbye.