O. triangularis requires bright or direct sunlight supplemented with a cool indoor temperature of 15 °C (59 °F).
It can tolerate higher indoor temperatures but will go into dormancy prematurely and/or begin to take on a "tired" appearance if temperatures exceed 27 °C (81 °F) for prolonged periods of time.
It thrives in an average potting soil with good drainage.

Mature plants are cut back to the soil every 3–5 years in early summer or during the dormancy period.
 Young plants are cut back to the soil every year in early summer or during the dormancy period, until they reach maturity.
Fearing frost, they are usually grown indoors.
They are planted in soil rich in humus and well drained.
In winter, they should not be watered.
O. triangularis requires bright or direct sunlight supplemented with a cool indoor temperature of 15 °C (59 °F). It can tolerate higher indoor temperatures but will go into dormancy prematurely and/or begin to take on a "tired" appearance if temperatures exceed 27 °C (81 °F) for prolonged periods of time. It thrives in an average potting soil with good drainage.
Mature plants are cut back to the soil every 3–5 years in early summer or during the dormancy period.  Young plants are cut back to the soil every year in early summer or during the dormancy period, until they reach maturity. Fearing frost, they are usually grown indoors. They are planted in soil rich in humus and well drained. In winter, they should not be watered.
Oxalis triangularis