Luffa cylindrica (Sponge Luffa) http://www.durgan.org/URL/?AVITH 12 September 2009 Luffa cylindrica (Sponge Luffa) There are about seven large fruit, but they must dry on the vine before making sponges. The growth has been poor this year due to cool weather and not enough sun. The trellis should be completely covered with vegetation in good year.