Hydrangea is a flowering plant that belongs to the family Hydrangeaceae. The name comes from the Greek words “hydro” (water) and “angeion” (vessel), referring to the shape of its seed pods, which resemble small water vessels. There are over 100 species of hydrangeas, with the most common being the bigleaf hydrangea (Hydrangea macrophylla). These plants are known for their large and showy flowers that can be white, pink or blue in color, depending on the acidity of the soil. In alkaline soils, hydrangeas produce pink or red flowers; in acidic soils, they produce blue flowers.