A superb Japanese bunching onion, Spring Onion Summer Isle has been bred for its sweet flavour and low pungency. Sow in succession for harvests during summer and autumn. Spring Onion Summer Isle is fantastic in salads and stir-fries. (Allium cepa)
Sow seeds outdoors late winter/early spring just as soon as the ground is workable. Sow seeds thinly in an open sunny site 2cm (1in) deep in 30cm (12in) apart rows.
Thin out when 5cm (2in) high to 2½ cm (1in) apart. After six to eight weeks thin plants still further so that those remaining are 10-15cm (4-6in) apart.
Start to harvest by using the thinnings make tasty additions to a salad. Hoe and hand-weed as soon as the seedlings emerge. Mature plants can be pulled in the autumn and used in a similar fashion to leeks.
For years onions have been used as one of the oldest medicines for their anti-bacterial, antiseptic and anti-asthmatic properties. They have also shown to lower blood pressure and cholesterol levels.