The beautiful flowers produced by this plant is what makes these so popular. Most put on a showy display from early spring all the way into fall. The large flowers come in a variety of shapes, colors, and sizes. Hydrangea blooms can be pink, blue, red, white, purple and green! The flowering shrubs can grow in partial shade to full sun. Many people remember hydrangea shrubs from their childhood. Today we are falling in love with them all over again.