Pencil Cactus in Hanging Luna Sphere

LIGHT: The pencil cactus prefers to grow in full sun, meaning at least six hours of sunlight on most days. However, it can tolerate a bit of shade and might even appreciate some protection from hot afternoon sun. Indoors, grow it by your brightest window.

WATER: The watering care for this succulent is very easy. It only needs water every two to three weeks in the spring and summer. Reduce watering to monthly in the fall and winter. It's preferable to let the soil dry out completely in between waterings to avoid overwatering. This plant is highly tolerant to drought, and too much water can rot its roots.

TEMPERATURE and HUMIDITY: The pencil cactus thrives in warm temperatures ranging from 65 to 75 degrees Fahrenheit. Temperatures around the plant should not drop below 50 degrees Fahrenheit. Indoors, be sure to protect your plant from cool drafts, including those from an air conditioner. The plant also thrives in low humidity. But a higher humidity level shouldn’t bother it as long as the soil doesn’t retain moisture. 

FERTILIZER: This plant isn’t a heavy feeder. Feed your pencil cactus with a balanced liquid houseplant fertilizer in the spring, and it should be fine for the rest of the year.