Thought by some gardeners to be the most beautiful of the white hydrangeas, 'Annabelle' (Hydrangea arborescens 'Annabelle') is very low maintenance and can be spectacular with morning sun and afternoon shade or dappled shade throughout the day. (With hot afternoon sun, the plant will not die, but the blossoms are shorter-lived.) It grows 3-5 feet tall with a 4-6 foot spread.