Grow Begonia maculata using sandy clay and loamy soil as potting mix. Provide bright indirect light between 10k – 20k lux or 2k – 5k foot candles from an east- or west-facing window. When watering, keep the soil slightly damp and only water once the top inch (2.5cm) is almost dry about once a week. The ideal temperatures range lies between 67 to 70 degrees Fahrenheit