Oxalis triangularis, commonly known as Purple Shamrock or False Shamrock, is a charming bulbous perennial renowned for its triangular purple leaves that exhibit nyctinastic movement - folding closed at night. This species from the Oxalidaceae family is prized for its delicate flowers and animated foliage, making it a favorite houseplant.
Bright indirect light produces best purple coloration. Tolerates lower light but grows leggy. Avoid direct sun which scorches tender leaves.
Water when top inch of soil dries out. Reduce watering gradually in fall as dormancy approaches. Keep nearly dry during winter dormancy, resume in spring.
Well-draining potting mix with peat/perlite. Standard houseplant soil works well if not overwatered during dormancy.
Cool to average room temperatures 60-75°F (15-24°C). Avoid drafts and temperature extremes. Average household humidity sufficient.
Monthly balanced liquid fertilizer during active growth (spring-summer). Stop completely during dormancy period.
Trim dead foliage during dormancy. Pinch leggy stems to encourage bushiness. Divide overcrowded clumps during repotting.