Hydrangea macrophylla is a species of Hydrangea native to Japan. Commonly reffered to as Bigleaf Hydrangea, French Hydrangea and Lacecap Hydrangea, not tomention a few others that I am not familiar with. It is a deciduous shrub, growing 3-6’tall. The leaves are opposite, simple and 4-8″ long, with a coarsely toothed margin. Its flowers are pink, white, or blue, depending partly on soil pH. In acid soils the flowers will be blue, in alkaline soils the flowers will be pink,and in neutral soil the flowers will be white.
There are hundreds of cultivars have been selected for garden use, varying in flower color. Gardeners can often control the flower colour by adding lime or aluminium sulfate to alter the acidity level around the plant. A good plant for use in a border in sothern and costal areas, in extreme cold regions this plant will dieback to the ground.