🧽 Luffa cylindrica Loofah / Sponge Gourd – Fast-Growing Climber for Edible Young Fruits & Natural Sponges

Luffa cylindrica is a vigorous, warm-season climbing plant grown both as a vegetable and for producing natural loofah sponges. When harvested young, the smooth green fruits are tender and mild, ideal for stir-fries and curries. Left to fully mature, the fruits dry into fibrous sponges perfect for eco-friendly household and personal care use. With its large leaves, yellow flowers, and strong vines, luffa is also an attractive plant for greenhouses, tunnels, and sunny walls.

Key Features

● Dual-purpose plant: edible young fruits or natural sponges
● Fast-growing, vigorous climbing habit
● Large yellow flowers attractive to pollinators
● Ideal for greenhouses, polytunnels and warm gardens
● Sustainable, plastic-free sponge alternative

How to Sow & Grow Luffa cylindrica (UK)

Sow indoors: III–IV (March–April) in pots
Transplant outdoors: V–VI (May–June) once frost risk has passed and nights stay warm
Direct outdoors: Not recommended in cool climates
Harvest (edible): VII–IX (July–September)
Harvest (sponges): IX–X (September–October)

Germination temperature: 22–28 °C (72–82 °F)
Average germ time: 7–14 days
Depth: 2–3 cm (¾–1¼ in)
Light required: Yes
Moisture: Regular watering; do not allow to dry out
Environment: Full sun
Soil type: Rich, fertile, well-drained soil with added compost
Plant spacing: 60–90 cm (24–36 in)
Vine length: 3–5 m (10–16 ft)

Sowing & Growing Tips (variety-specific)

● Provide strong supports for climbing vines.
● Start seeds indoors for best results in the UK.
● Harvest young fruits frequently for vegetable use.
● Allow fruits to fully mature and dry on the vine for sponges.
● Peel and rinse mature fruits to reveal the natural loofah fibre.

Special Features

● Produces genuine natural loofah sponges
● Edible fruits when young, fibrous sponges when mature
● Excellent choice for sustainable living gardens