Hydrangeas are a beloved indoor-outdoor flower known for their abundant, colorful blooms from late spring through early autumn. With over 75 species and 600 cultivars worldwide, they offer a wide palette of vibrant pinks, whites, lavenders, roses, and blues, making them ideal for diverse garden settings and occasions. Expert photography captures varieties like the vivid Alpenglühen and delicate Lanarth White, while gardening insights help maximize bloom potential, ensuring these classic flowers continue to enchant gardeners with their timeless charm and striking colors.