Spring Onion - Evergreen Bunching This is an excellent variety for providing fresh salad onions in autumn. The hardy salad onions stand through winter and are crispy and non-bulbing with a mild flavour. Sow outdoors thinly, from March to September, where they are to crop, 1.5cm deep, directly into finely-prepared, well-dug, fertile soil, which has already been watered. Allow 15cm between rows. Seedlings usually appear in 14-21 days. No thinning is required, but keep well-watered in dry spells. Regular sowings, made every three weeks, will ensure a continuous supply through the summer. Harvest from March to October. August to September sowings will be ready the following spring.