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 Aristocrat - this variety features a waxy skin and is medium green in color. 2  Black Zucchini - very dark green skin and almost white flesh, very common variety of zucchini.  Zucchini Gadzukes - dark green with distinctive light green ridges, resembles a star when sliced crosswise, compact plant.
When To Pick Zucchini. Most zucchini varieties are ready to pick when they reach lengths around six to twelve inches long. They can be longer or shorter depending on your variety and preferences. I try to stick to the âpick early, pick oftenâ rule to encourage more production. The zucchini should be a dark green color (color can depend on the variety of zucchini you are growing. There are yellow and even white colored zucchini.