onion 'Fasto'

Thin plants to 15cm apart. Water in dry weather and feed every two weeks with a general purpose fertiliser. Cease watering and feeding once bulbs have swollen in mid-summer. Onions can be harvested as soon as they're big enough to use. See advice profiles for onions and shallots for further information

No pruning required

Propagate by seed sown under glass in early spring, or outdoors in April. Sets may be planted out in April

May be susceptible to onion fly and allium leaf miner

May be susceptible to onion white rot, leek rust and onion downy mildew