Sow radish seeds directly in the soil. Sow them outdoors from March under fleece, or under cover from mid February in rows 10-15cm apart. They are useful for inter-cropping and catch-cropping or marking rows of slower germinating seeds.
Radish growing calendar
Radishes (raphanus sativus) have been cultivated for about 4,000 years. The varieties grown today trace back to three separate domestications of wild radishes in Eurasia and Japan. Radishes are an edible root vegetable of the Brassicaceae family. The strong, slightly pungent flavour of radishes is caused by allyl isothiocyanates. These are oils present in mustard, horseradish, and wasabi as well.