Question: when a zucchini is bad?
Answer: A bad zucchini squash is easily identifiable as the skin appears dull and lifeless. Do not eat a zucchini if it is covered with rotten spots or decay. The vegetable may feel mushy, and the skin may be wrinkled or shriveled. If you cut into a bad zucchini, the inner flesh may be stringy and filled with large seeds.