Annabelle hydrangea Behind it is a evergreen hedge ~ 3 feet tall. 10 months later, successfully blooming but are almost 5 ft tall and are crouching onto impatiences in front. Very awkward looking in middle of other 2. This area gets full sun in afternoon. One, can I keep this plant shorter than 3 feet and successfully bloom or should I dig them up and move to another area that can tolerate the spread? HELP!