Grasses offer another dimension to a garden with their movement and rustling in the wind. The smaller varieties can be planted in containers, on their own or with other plants to give contrast. Taller varieties give structure to a bed and are particularly attractive in the autumn and winter with frost on their foliage and flower plumes. Spring is the best time to give grasses a haircut, allowing the new foliage to emerge. Take care not to cut back to hard as the growing tips near the roots must remain intact to re-grow. They thrive on moist but well drained soil, in sun or part shade, but do not like to be waterlogged over the winter months.