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.
