A classic and easy-to-grow shrub with giant white flowerheads. Spherical blooms of white florets emerge lime-green and turn white, age light green, then turn tan in fall. Medium-green leaves are almost round. Bloom time is midsummer until frost and flower size is up to 25 cm.

Caring for Hydrangea arborescens, commonly known as Smooth Hydrangea or Annabelle Hydrangea, involves providing it with the right growing conditions and regular maintenance. This deciduous shrub thrives in partial shade to full sun and prefers moist, well-draining soil. Regular watering is essential, especially during dry spells, to keep the soil evenly moist. Apply a layer of mulch around the base of the plant to help retain moisture and suppress weeds. Prune the shrub in late winter or early spring, cutting back the old wood to promote new growth and ensure a compact shape.

Smooth Hydrangea blooms on new wood, so pruning won't affect its ability to flower. Fertilize the plant in early spring with a balanced slow-release fertilizer to encourage healthy growth and abundant blooms. Protect the plant from strong winds, as they can cause the large flower heads to droop. With proper care, your Hydrangea arborescens will produce beautiful, rounded clusters of white flowers and enhance the beauty of your garden or landscape.