The Sponge gourd / Luffa or the Tori is a highly fibrous vegetable and has a flavor and taste which is similar to bitter melon. ... Organic compost, or fertilizers high in nitrogen are ideal for the sponge gourd's growth. . The interior flesh of the Sponge gourd is smooth and creamy-white. Sponge gourd has a mild, zucchini-like sweet taste and a silky texture. Mature fruits are not tasty, being fibrous, bitter and brown.