The Hydrangea plant are known for their large, showy flower clusters in colors like pink, blue, white, purple, and green, with some varieties changing color based on soil pH. Blooming from late spring to early fall, they typically grow 3 to 15 feet tall. Hydrangeas prefer morning sun and afternoon shade, consistent moisture, and well-draining, rich soil. Fertilize in spring with a balanced, slow-release fertilizer. Prune according to the blooming type: after flowering for old wood bloomers and in late winter or early spring for new wood bloomers. Mulch in colder climates to protect roots and ensure good air circulation to prevent pests and diseases.