Luffa (Luffa aegyptiaca)

Luffa (Luffa cylindrica): the famous loofah!
Interesting Cucurbitaceae (sometimes called pumpkin) from Asia, used both for the vegetable sponge it produces and for consumption as a fruit (when still unripe).
The plant has a climbing habit but can also be left in the ground.
Easy to grow because it's particularly hardy and resistant to fungal diseases. It requires good irrigation, especially in the early stages. It's vigorous and very productive; rich soil will ensure exceptional results.
Sowing should be carried out in a seedbed at a minimum temperature of 15°C,
It's best to grow it in a heated nursery: the fruit takes several months to ripen, and by growing it early, we'll avoid problems with low temperatures. We recommend growing it under a pergola or climbing support so that autumn rains don't rot the fruit before harvest. The flowers are large and numerous, similar to those of lagenaria but a deep yellow in color, and very decorative.
The fruits can be eaten like courgettes when unripe, the flavour is reminiscent of the latter, with a more herbaceous component.
However, they are not grown for consumption but for the sought-after sponges, as you can learn more about in the next section.

From the Luffa (name derived from the Arabic term “ Louff“ ) a highly sought-after and appreciated vegetable sponge is produced.
Obtaining it is simple, all it takes is patience: the "pumpkins" for extraction will be ready after several months (about 6-7 from planting). For this reason, it is best to grow them on a climbing support or a pergola. This will prevent the fruits from being damaged by any autumn rains and will allow the fruits to grow vertically, resulting in better-quality sponges. To extract the sponges, simply wait until the fruits (about 4 months after fruit set) have a "dry" appearance, with a yellow/brown color, and the skin will be hard to the touch. At this point, if it hasn't rained in recent days, you can extract the sponge and seeds; otherwise, store them in a ventilated area to dry. Using your hands or a small knife, open the fruit's "peel" to reveal some lovely sponges. Cut them into pieces about 15-20 cm long and remove the seeds. Wash them until they're almost white, then set them aside to dry in a well-ventilated area. Luffa sponges are slightly rough, but they have a very pleasant exfoliating effect. After use, rinse them and let them dry; they'll last a few months.