Hydrangea pan. Pink Diamond (Pink Diamond Panicle Hydrangea)Large pyramidal cone shaped flower clusters Flowers start white and age to a rich pink Red stems hold up large flowers with no drooping Thrives in urban conditions 12 long and 8" wide dense, pyramidal, cone shaped panicles emerge white but mature to a rich pink at the ends of red stemmed branches. Strong stems hold the huge flowers upright with no drooping. Flowers bloom from July through September. This is one of the most winter hardy of the