Plant in lightweight potting soil
Plant your Chinese hibiscus in a lightweight, well-draining potting soil and not in the normal garden soil. Make sure that you select a pot that has a proper drainage system to allow the excess to water seep out.
Place your plant in a location where it can get adequate amount of sun light, but make sure that it is protected from strong winds and hot sun rays in the afternoon. Hence, a spot close to window would be an ideal location for your hibiscus plant during the winter months.
Give your hibiscus lots of light
Outdoors, the Chinese hibiscus requires full sun; therefore, make sure that your potted plant placed inside also receives lots of bright light. If grown in low light, your hibiscus will fail to bloom or flourish. Sunroom location is the best choice for this plant.
Keep your Chinese hibiscus warm
Remember that proper heat is a crucial requirement of a Chinese hibiscus, even more so than light. These plants require temperatures between 55 to 85 degrees Fahrenheit (12.7 to 29.4 degrees Celsius) for their vegetative growth and flower initiation.
These plants require at least one inch of rain every week. Keep the potting medium moist all through the year, but do not let the container sit in water or the soil become too soggy. Use room temperature distilled water or rain water if possible. A hibiscus shrub needs relatively lesser amounts of water during the winter months, so let the soil a bit dry between watering.
Feed both your indoor and outdoor Chinese hibiscus with recommended amount of fertilizer. Fertilize your outdoor plants once in a month, and twice a month indoors.