Growing luffa requires patience and a long growing season. These rambling, strong growing vines can grow to 6 m (6.5 yd) or more in length. A structural support is required for the vines to grow on. Note that the chance of producing mature fruit in zone 5a or lower is slim.
How to Grow
Growing luffa requires patience and a long growing season. Start seed indoors one month before your last frost date. Sow see 2 cm (3/4″) deep in a soil-less mix and keep at 21 C (70 F) for the 7 to 14 day germination period. Grow on under bright light and warm conditions until hardening off and transplanting outside after the danger of frost has passed. Space transplants 1 m (39″) apart near a structure that will allow the vines to climb. Vines can be grown on the ground but they will tend to produce curved fruit. Seed can be sown directly into the ground in Zone 7 but should be started indoors when growing in zone 6 or 5b. Growing luffa to maturity in zone 5a or lower is a challenge and typically does not produce usable fruit.