Many salvias, or meadow sages, of varying hardiness and appearance are available to the gardener. Salvia officinalis, culinary sage, usually about two feet tall, has gray-green leaves and white or lavender flowers. Salvia x superba is a sterile hybrid. It has gray-green, paired leaves covered with tiny hairs underneath on square stems growing up to three feet high. They bear dense spikes of showy, violet-purple flowers. Uses vary with the type of salvia, but all can be massed and used in flowerbeds and borders. Salvias need full sun and good garden soil with excellent drainage. Do not crowd the plants. After flowers have finished blooming, trim them off for neatness and a second showing.