Choose the Best Hydrangeas for Your Garden. Varieties for sun AND shade, warm AND cooler zones. This one, Vanilla Strawberry Hydrangea paniculata 'Rehny', bears large clusters of white flowers that fade to pink from midsummer to autumn. It grows 7 feet tall. While most hydrangeas do best in shade, varieties of Hydrangea paniculata prefer sunny spots. Most selections have large clusters of white flowers in summer. The showy blooms fade to shades of pink or red before drying to beige.