50 days — The leaves of 'Tango' are extremely frilly and almost look like endive. The plants are attractive, uniform, and dark green in color. Leaves are tangy tender but hold up well to salad dressings. You can harvest and use young leaves in a "cut and come again" fashion or wait until they mature into tight, compact rosettes. Best if grown as a cool season crop as like many lettuce varieties, it can become bitter in hot weather. Each packet contains one gram, which is approximately 500 to 600 seeds.