INVINCIBELLE® Spirit II Smooth Hydrangea has dark pink flower heads that appear in summer and fade to green in the fall. Unlike many other hydrangeas the pink flower color is not affected by soil pH. The flower heads contrast against the dark green foliage. INVINCIBELLE® Spirit II hydrangea grows to about four feet tall and wide and its compact size makes it suitable in many locations in the garden or as a container plant. It prefers soil that is well-drained and where moisture levels are maintained during hot periods and drought. Prune in late winter or early spring.