The 'Annabelle' hydrangea is a smooth hydrangea cultivar known for its large, globe-shaped, pure white flowers that can grow up to 12 inches wide, a mounding form reaching 3-5 feet tall, luch green foliage, and reliable bloom on new wood. It flowers from early to mid-summer and fades to an attractive tan in the fall, remaining a popular, low-maintenance shrub for various garden settings