Triplet lilies (Triteleia laxa) have many other common names including Ithuriel's spear, grass nut and Queen Fabiola. Their underground root structures are often called bulbs, but they are actually corms. Triplet lily bulbs (corms) are hardy to USDA hardiness zone 7 and are best planted in the fall if you want them to bloom the first spring or early summer. However, in colder zones, triplet lily bulbs need to be stored during winter and planted after the last frost in the spring.
Prepare the planting bed, which should be in full sun; however, triplet lilies can tolerate some shade. Till the top 12 inches of your soil with a garden rake and mix in about 3 inches of organic matter such as sand, compost or peat moss.
Plant the bulbs 3 inches below the soil. The pointy tops should be facing up. Space multiple bulbs several inches apart. Generally, leave spaces between the bulbs that are two times the width of the bulbs.
Firm the soil so that there are no remaining air pockets. Then, cover the area with 2 to 3 inches of mulch, such as pine needles or bark. Water the area well.