ABOUT THE PLANT

Oxalis are not only excellent houseplants because they come in a range of colors and sizes, but also because they are so prolific. They are, in fact, SO prolific that they are considered to be weeds to gardeners and greenhouse growers worldwide. Many will go through a dormant phase in the wintertime if kept as a houseplant. A significant portion of the play may die and go into dormancy if not receiving enough light. Give a dose of fertilizer and more light and it’ll grow back.

Many Oxalis, like most legumes and a few other plants, exhibit a phenomenon known as nyctinasty. Nyctinasty is a form of rhythmic circadian nastic movement of plants in response to the onset of darkness. The plant senses light quality and type via receptors, and sends a response to the pulvini, which are joints bulging with cells at the base of the leaflets. The pulvini then release sugars and potassium ions that eventually cause the characteristic drooping of the leaflets. 

Sunlight
Thrives in bright indirect to bright indirect light. Can handle a few hours of sun.

Water
Water weekly. Allow potting mix to dry out before watering. Soil about 1-2” down should be dry to touch. Water more frequently during warmer months and fertilize during growth. Generally, the plant will droop to show that it needs more water. Do not overwater or keep the soil wet for too long, as this will encourage root rot.

Humidity
Any humidity level will do. Normal room humidity is fine.

Temperature
65°F-85°F (18°C-30°C). It’s best not to let it go below 60°F (15°C).

Common Problems
It is generally a very easygoing plant. Should it get spider mites, treat the plant as soon as they appear with weekly sprays of horticultural (Neem) oil and regular wipe-downs of the plant.