Many people who are growing a hibiscus plant choose to do so in a container. This allows them to move the hibiscus plant to ideal locations, depending on the time of year. Provide the plants with at least six hours of sunlight, especially if you want to see those lovely blooms. Although warm, humid conditions are ideal for tropical hibiscus, you may want to provide a little afternoon shade when it’s overly hot. Again, containers make this easy to do.
Temperatures for Growing Hibiscus When you care for a hibiscus, you should remember that hibiscus flowers best in temperatures between 60-90 F. (16-32 C.) and cannot tolerate temps below 32 F. (0 C.). In the summer, your hibiscus plant can go outside, but once the weather starts to get near freezing, it’s time for you to bring your hibiscus indoors.
Watering Hibiscus When hibiscus are in their blooming stage, they require large amounts of water. Your hibiscus will need daily watering in warm weather. But once the weather cools, your hibiscus needs far less water, and too much water can kill it. In the winter, water your hibiscus only when the soil is dry to the touch.
A growing hibiscus plant needs lots of nutrients in order to bloom well. In the summer, use a high potassium fertilizer. You can either use a diluted liquid fertilizer one a week, a slow release fertilizer once a month, or you can add a high potassium compost to the soil. In the winter, you don’t need to fertilize at all.