Daylilies come in a variety of sizes and colors, due to the hybridization of over 30,000 cultivars worldwide. Dwarf daylilies are 1 ft. tall and twice as wide; larger types may be up to 3 ft. tall with even taller stems. Daylilies grow successfully in amended, well-drained soil, full sun to partial shade, with twice-a-week watering. For longer flowering, feed every 2-3 weeks while blooming. Divide daylily clumps every 3-5 years, mulch in winter.