Light:

Partial sun, an eastern or western exposure. Rex Begonias can tolerate low light but perform better with some direct sunlight.

Temperature:

Maintain temperatures indoors above 60°.

Humidity:

Preferably 50% or higher; however, they will tolerate low levels of humidity for a short time.

Watering:

Bring soil to a state of visual dryness between waterings. When watering, thoroughly saturate the soil until some water runs out of the bottom of the pot. Clay pots will ensure a quick dry down. Do not over water.

Fertilizer:

Moderate feeders when grown under high light. Fertilize with ¼ tsp of fertilizer per gallon of water once a week during the summer or when actively growing. Use a balanced fertilizer like a 15-15-15 or 7-9-5.

Pruning:

Pinch the tips of the young plants to encourage branching. This will help create a bushy plant and discourage leggy growth. On older plants, prune when growth gets excessive.

Insects and Disease:

Little susceptibility to insects, however mildew can be a problem. Treat seasonally with a preventative spray of 1 TBL of baking soda to a quart of water with a dribble of dishwashing soap.

Comments:

Rex Begonias have a resting period in the winter; at this time do not over water them. Give some direct sunlight.