Hibiscus grows best in slightly acidic soil that has a pH between 6.5 and 6.8. Prior to planting, determine your soil’s pH by testing it. If necessary, apply amendments to alter pH.
Hibiscus needs 4 to 8 months with nights that are at least 20°C. To avoid early flowering during the first five months of growth, it also needs 12–13 hours of sunshine. During their first four months of growth, hibiscus plants need a monthly rainfall of between 5″ and 10″.