seeds of Musa paradisiaca when fully grown, the stem reaches a height of 10 - to 30 feet. Only female flowers develop into a banana fruit that vary in length from about 4 - 12 inches. The average weight of a bunch is about 25 lbs. The unripe fruit of banana, rich in starch, is cooked as food or dried and ground into flour. The fruit of the plantain (cooking banana) is larger, coarser and less sweet than the kinds that are eaten raw The seeds need to be soaked for 24 hrs and then sown no deeper than the thickness of the seed and kept at 68 - 77 degrees with light. These can take anywhere from 8 weeks to 4 months to germinate.