Wormwood is a woody perennial sub-shrub noted for its fragrant, silvery foliage and tolerance for poor growing conditions. Itrequires minimal upkeep or care once established in a sunny site with fast-draining soil. However, the plants will look better and live longer if watered occasionally during the summer months and pruned periodically to refresh their foliage. Idoor: Sow thinly in a lightweight soil mix. Cover twice seeds thickness with soil. Press firmly and water. Keep evenly moist but not soggy. As seedlings appear, gradually expose them to light. When large enough to handle, transplant to pots. Harden by gradual exposure to outdoor conditions. After spring frosts transplant to garden 30-90cm (12-36in) apart. Outdoor:After spring frosts sow thinly to garden 30-90cm (12-36in) apart. Cover 3 times thier diameter with soil. Thin to 20-50cm (8-20in) apart.