Sow outdoor March to May. To grow big perennial plants it is best to grow chives outdoors. Choose a sunny location for best results and wait until the soil has warmed up, ideally to around 10°C+. Then sow thinly directly where plants are to grow. Make a shallow trench 0.5cm deep and cover the seeds with fine soil. Keep the soil moist and weed free. It is important to keep on top of weeding as the thin leaves of young chives are easily shaded out by any competition. Thin out the seedlings to 20cm apart when large enough to handle. Carefully removed seedlings can be planted out elsewhere if desired. Over the years mature plants can spread out to form large, attractive and productive clumps. Once established, a regular liquid feed will help maximise crops.