Flowers are lilac in color. A suitable compost for shamrocks consists of 2 parts peat moss to 1 part loam to 1 part sand. Bright indirect light is best, but they will grow in lower light levels. Fertilize weekly while they are growing with a balanced fertilizer. No matter what you do, they will seem at times to be unhealthy and lose their leaves.
Shamrocks are bulbs, and they require a dormant period every once in a while.
Restrict all watering. As with any bulb, let the leaves die back naturally. Do not remove any leaves until they are brown. Let the bulbs stay dormant for 3 to 4 weeks, then water and fertilize. In most indoor-grown shamrocks, this dormant period occurs 2 to 3 times a year.