Radish - French Breakfast 3 This variety is easy and fast to grow with a good flavour. This is the most popular traditional variety for its mildness and crisp, tender tankard shaped roots with a white tip. Sow outdoors thinly, from February to September, where they are to crop, 1.5cm deep, directly into finely-prepared, well-drained, fertile soil, which has already been watered. Allow 23cm between rows. Early sowings, especially those in February, will benefit from cloche protection. Seedlings usually appear in 7-10 days. Water well until plants are established. Thin only if plants are overcrowded. Harvest from April to October.