Hydrangea macrophylla 'Hamburg' (Bigleaf Hydrangea)

Hydrangea macrophylla 'Hamburg', also known as Bigleaf Hydrangea, is a deciduous shrub with large rounded flower clusters that can change color based on soil pH. The flowers can range from pink to blue to purple, depending on the soil acidity. This shrub can grow up to 6 feet tall and wide, and it has bright green foliage that provides an attractive backdrop for the vibrant flowers.