Hydrangea macrophylla 'Bloomstruck'
This macrophylla has outstanding sturdy red stems. Great heat tolerance and disease resistance as well as huge 5-inch blooms.
Adjust soil pH for color preference. Acidic soil yields blue flowers, otherwise pink. 3-4' high and slightly wider spread.
Prefers partial shade in moist, well-drained humus-rich soil.
Big Leaf Hydrangea