20 days — 'French Breakfast' radishes, one of the most popular varieties, are oblong in shape with a blunt tip. Their skin is scarlet colored with white tips. They have crisp, white flesh and a great, mildly pungent flavor. 'French Breakfast' is a very old variety dating back to a commercial introduction date prior to the 1880s. Each packet contains three grams, which is approximately 220 seeds.