Spring Sizzle HydrangeaSpring Sizzle Hydrangea is one of the earliest blooming panicle hydrangeas that brings unforgettable blooms and color to the garden. Starting in early summer, Spring Sizzle is covered in white flowers that quickly transform to deep red, even in warm regions. Plus, the blooms are held up on strong stems that wont flop. Maturing at four to six feet tall and four to five feet wide, this hydrangea is perfect for hedges and foundation plantings.