Round, bolt resistant onions which keep well and have a hard skin. Sizes: 10-21 mm (A) and 21-24 mm (C). To reduce the risk of bolting, onion sets should be stored in a warm and dry environment (18-20 °C is ideal). The small sized selection (G521A) is recommended for producing mature onions. The larger sets (G521C) are more likely to shoot than the smaller ones and since they grow more quickly and vigorously, they are best suited for marketing green. Exclusively grown for us from Demeter seeds. Please order in time. (In case of a shortage of supply, we reserve the right of replacement deliveries).