Many salvias have highly aromatic foliage, with scents ranging from the delicious to the outright unpleasant. Most salvias are extremely easy to grow and once established need little attention, beyond occasional deep watering in hot weather and some cutting back after flowering. The tall salvias are ideal for the rear of the border or as filler between shrubs. Be sure to provide sunlight, perhaps in a scree (a slope covered with small loose stones) bed and in the case of half-hardy plants, a position against a south-facing wall. Any well-drained soil is suitable. Mulching with decayed manure in the early spring improves the soil condition.