38 days. Nile is easily the most unique radish we've seen in a long time! These beautiful crops produce striking, scarlet-colored roots with vivid red stems. The 1–1 ½ inch, globe-shaped radishes have bright white interiors that are sweet-hot and tender. Spineless leaves are great for fresh eating, too. The roots hold up very well in the heat of summer without developing the least bit of pithiness.