Shamrock flower, also known as Oxalis or wood sorrel, is a flowering plant often grown indoors and valued for its small, dainty flowers and colourful, clover-shaped foliage. The leaves of the shamrock plant appear in shades of green, red and purple, depending on variety, and some even feature patterns or variegation. Typically available in nurseries and garden centres in fall through spring, shamrock flower bulbs require special care to continue growing past St. Patrick's Day. When provided with proper environmental conditions through their dormant period, however, the bulbs will produce new foliage and flowers several times per year.
Plant shamrock flower bulbs in a medium-size container during spring or fall. Use a growing medium made of one part potting soil and one part peat moss to provide adequate drainage. Plant bulbs about 1 inch deep and at least 4 inches apart.
Keep the shamrock plant in a location that receives bright, full sunlight throughout the day. Maintain a consistent temperature of 21.1 to 23.8 degrees C during the day and 12.7 to 15.5 degrees C at night.
Water shamrock flower once every seven to 10 days, allowing the soil to dry slightly between applications. Apply water directly to the soil to prevent moisture from accumulating around the base of the plant, which can cause disease.
Feed shamrock flower bulbs once each month during the spring, summer and fall months. Use an all-purpose houseplant fertiliser to provide proper nutrition. Apply according to the product's directions for the best results.
Cease watering when the leaves begin to die back during summer. Remove all brown leaves from the plant, and then transfer to a cool, dark location for two to three months. Return the plant to its original location after new growth begins and resume routine care.
Repot shamrock flower bulbs immediately after dormancy, if necessary. Use a fresh growing medium and a slightly larger container to provide room for growth. Shamrock flower bulbs can be discarded after they begin to die back if a forced dormancy is not desired.