Surface-sow under glass from mid- to late spring, or wait until after all the worst frosts have passed and sow in a sunny spot outside into well-prepared, freely draining soil. Those grown in pots can be potted on when they are large enough to handle and gradually acclimatised before planting out at 45cm intervals after all risk of frost has passed. The leaves can be picked and used fresh, or dried for use in winter. If drying them, try to pick them before the plants start to flower to make sure they retain their flavour.