Quite a number of different citrus varieties can be grown indoors in pots, and many will produce fruit when grown under the correct conditions. Key elements for success are good light, adequate humidity in the winter, well-drained potting soil, additional nutrients, and consistent watering. 

Citrus plants need full sun--at least 6 hours a day of direct sunlight. If you don’t have a south-facing window, full-spectrum fluorescent lights can be used as a supplement. Citrus can also be grown outdoors in the summer and moved indoors for the winter.

These plants need high humidity--the humidity level in most houses in the winter is too low for ideal citrus culture. It is helpful to spray the trees frequently, or even better, to use a room humidifier. You can also stand the pot on tray of damp pebbles or moist peat moss. (A dry, hot environment attracts mites.)

Citrus grow best between 55°F to 85°F. It can tolerate 40°F but stops growing actively below 50°. It's best to water actively growing plants moderately, allowing the top inch of the mixture to dry out between waterings. In any resting period, water only enough to keep the mixture from completely drying out.

Citrus tone helps with fertilization.

For more information on growing citrus indoor and on the best varieties to choose, see our guide Citrus as a Houseplant.

For tips on a variety of gardening topics, see our Plant Information Guides.
- Courtesy of NYBG Plant Information Service