Tennis ball sized, round red, white veined, crisp heads adding colour to salads or cooked vegetables. Boil leaves to remove bitterness, fresh leaves add zest to a mixed salad.
Sow thinly under protection in February to April for earliest harvest in summer, or May to August outdoors to harvest from October. Sow in rows, 13mm deep, 30cm between rows.
At all times keep weed-free and well watered. Mulching with black polythene or straw between rows conserves moisture and suppresses weeds. In late autumn and winter, when temperatures are low, the outer leaves will close together tightly to form heads and at the same time the red colour will intensify. Can also be sown thickly under glass all year round for 'salad leaves'.
Blend radicchio with summer vegetables on the grill or in a marinated salad or a panini/ciabatta sandwich for a tasty meal in minutes.