What you need to know aboutt luffa flowers
Luffas have separate male and female flowers, both yellow. Female flowers are large, solitary and have long, bulbous stems, while male flowers are in clusters of buds with thin stems.
• Female flowers can benefit from hand pollination. This is best done in the morning for smooth luffas, and in the evening for ridged luffa (their flowers open in the evening). To pollinate, pull off a male flower and rub it gently on the female or use a cotton swab or fine paint brush to transfer pollen.
• Unpollinated flowers will fall off and pollinated ones will form the start of a luffa at the base of the female flower. When conditions are too cold, the young fruit may drop prematurely.
• Remove the first flowers and the first four lateral branches to increase fruit yield and quality. Any pitted or damaged fruits should be taken off – they will not recover.