Sow outdoors April to July. Sow thinly 1.5cm deep directly where they are to grow, in rows spaced 45cm apart. Keep the soil moist and weed free at all times. Seedlings should start to appear approximately 7-21 days. Thin out by taking alternate plants, allowing the remainder to grow on. Thinnings can be used in salads. Thin seedlings out to a final spacing of 20cm apart. It is good practice to water well after thinning out, to wash any dislodged soil back around the roots of the remaining plants. As the bulbs begin to swell at the base of the stem draw soil up around them to maintain their whiteness and give the best flavour.