Sunlight is especially needed for setting flower buds in the fall. Prevent freezing of buds in the spring after they have begun to swell. Each plants watering needs must be learned because of the many variables that affect the need for water. In general, do not sprinkle flowers as many are spotted by this application. Protect from rain and wind to avoid spotting or bruising.
Flowers tend to wilt before the leaves.
Reference Wood, Terry. Cultivating flowering and fruiting Bonsai.