Radicchio ZUCKERHUT 400 SEEDS £2.20 Quantity: at £2.20 each Add To Basket Forms upright, green coloured heads. Mild tasting. Sowing instructions: Sow from the end of June to mid July in rows 30 cm apart. Growing instructions: Thin to 25 cm between plants. Harvest in autumn, will tolerate light frosts. Average contents: 400 seeds.