Pencil trees need strong, extended light exposure and in the northeastern United States that usually means giving it the sunniest possible place in your home (south-facing is best), with 6 to 8 hours of direct sunlight per day.  Your plant will benefit from being turned weekly so that all sides receive equal light. Without extended, direct light, your plant will begin to stretch and become weak.

If the sun in your sunniest window is not adequate, artificial lights should be considered, alone or in combination with natural light. Artificial light is not equivalent to daylight in strength and must be delivered for at least 14 to 16 hours per day. (For more detailed information on see our Guide to Artificial Light for Houseplants.)

Read more about the care of a pencil tree in our Guide to Pencil Tree Houseplants.

Courtesy of NYBG Plant Information Service