Causes of ALS. ALS is a somewhat diverse and decidedly mystifying disease. In more than nine out of every 10 cases diagnosed, no clear identifying cause of the disease is apparent, that is, patients lack an obvious genetic history, complete with affected family members.
1 Gold Rush - A unique zucchini variety that features gold colored fruit and a classic zucchini taste, compact plant. 2  Black Beauty - this variety bears very dark green fruit, very compact plants.  Embassy - features medium green fruit, almost spineless plant, very heavy producer.
There are yellow and even white colored zucchini. Check your seed pack or plant tag for the mature color of your particular zucchini), and be firm to the touch. If your zucchini feels mushy or soft, it could be starting to rot. Zucchini plants can get very large, and have very broad leaves.