Hydrangea arborescens

The most famous cultivar of Hydrangea arborescens is the 'Annabelle', which is renowned for producing massive, spherical clusters of white flowers that can reach up to a foot in diameter. The 'Annabelle' hydrangea was discovered growing wild in the woods near Anna, Illinois. It remains one of the most popular landscaping shrubs in the United States.

Because Hydrangea arborescens blooms on new wood, it should be pruned in late winter or early spring before the new growth begins. Cutting the stems back to the ground each year encourages stronger, more vigorous shoots. This practice ensures the plant produces larger, heavier flower heads during the summer.

Yes, the smooth hydrangea is highly cold-hardy and thrives in USDA hardiness zones 3 through 9. Because it flowers entirely on the current season's new growth, late spring freezes rarely destroy its blooms. This makes it a much more reliable blooming choice for northern climates than macrophylla varieties.

Hydrangea arborescens is native to the eastern United States, where it naturally grows in woodland settings and along stream banks. It thrives in partial shade and prefers moist, well-drained soils rich in organic matter. In the wild, it is often found as an understory shrub beneath larger forest canopies.