Grow these multiplier onions to add flavour to your meals. They can be planted in early spring as soon as the soil can be harvested. Place the onions 2 cm (1") deep with the roots down and space them 10 cm (4") apart with a space of 25 to 30 cm (10-12'') between the rows. Keep the soil moist throughout the flowering season. For picking, pull the green onions first in the centre of each onion to leave more space for the following seasons.