How to Pick and Dry Loofah Sponges


Fast-growing annual vines with yellow blooms up to 5 inches across, loofah plants (Luffa spp.) usually require a four-month growing season to produce mature gourds. Therefore, gardeners in the north may need to start them indoors about 4 to 6 weeks before the last spring frost. During the summer and early autumn, the heavy vines should be grown in humus-rich soil in full sun, preferably on a sturdy trellis or fence to keep their 1 to 2-foot gourds off the ground. Those fruits must be harvested before or just after the first autumn frost and are used both as bath sponges and dish scrubbers.

Pick and Peel Mature Sponges

If you live in an area with a long growing season, Jack Arnott of Cobb County Extension Service recommends that you allow your loofah gourds to dry on the vine until their skin is brown and brittle and you hear seeds rattle when you shake those gourds. Break open the skin at the blossom the end opposite the stem of the gourd to reach those seeds, if you wish to save them. It usually is easy to pick off the rest of the brittle skin with your fingers to reveal the sponge beneath. If you prefer, you can dunk the gourds in a bucket of water instead -- for any time period lasting from 5 minutes to several days -- and peel off their skins in wet strips.

Pick and Peel Immature Sponges

If your growing season isn’t quite long enough, Jeanine Davis of North Carolina State University Cooperative Extension reports that you can harvest adequate sponges from gourds which have only partially yellowed, as long as their skins are beginning to slip. After you make an opening to save the seeds, grab the end of one of the fibers running the length of the gourd’s ridges and pull on it to unzip the remaining skin.

Clean and Dry Sponges

Immediately plunge a less-than-mature sponge into a bucket of water to wash out any juices that remain due to its only half-dry condition. Although the sponge still will be white at that stage, it’s a good idea to soak it in a bleach solution to eliminate fungi and bacteria. Mature sponges also should be immersed in bleach solution, of 4 tablespoons of bleach per 1 gallon of water, both to kill contaminants and to brighten their naturally off-white color.

After disinfecting the sponges, rinse them with clean water and spread them in the sun to dry. A porous surface works well for this purpose. You can turn screens into drying tables by laying them horizontally on top of sawhorses.

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