Deciduous shrub: Named for Penny McHenry, the founder of the American Hydrangea Society. Great for those areas where early fall or late spring frost kills other hydrangea buds. Produces big 7" clusters of blue flowers summer-fall. Very tolerant of heat and humidity. Deer resistant. Attracts bees and butterflies. Bloom time: summer-fall. Bloom color: blue. Height: 4-6'. Width: 3-4'. Exposure: sun-part shade. Water: moist. USDA Z5.