UC Master Gardener Judy Hobbs shared advice on how to grow and harvest loofah, also known as luffa, in an article published in the March 2026 issue of the Mountain Democrat. Hobbs described the plant as a versatile vining gourd from the cucumber family that can be eaten when young or used as a natural sponge once mature.
Loofah is valued for its dual purpose: it serves as a nutrient-rich vegetable when picked early and transforms into a biodegradable cleaning sponge after drying. The plant requires a long growing season of up to 180 days, warm soil conditions, and consistent moisture. Gardeners are advised to start seeds indoors before transplanting outside after frost risk has passed.
“The tricks for planting and growing luffa” include using well-drained fertile soil with high organic matter, keeping soil moist but not soggy, providing full sun exposure, pruning vines regularly, and supporting growth with trellises or large containers. Harvesting typically occurs in fall when gourds are yellow-brown and lightweight; seeds inside can be saved for future planting or sharing.
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For those interested in discussing loofahs or other home garden plants, Hobbs invites readers: “If you would like to discuss luffas or any other plant in your home garden, you can Ask a Master Gardener for help. Submit your question through our online survey tool.”