French Hydrangea seeds– This traditional bigleaf hydrangea is also known as the florist’s hydrangea for its large, vibrant blooms. Mophead hydrangea – This variety of bigleaf hydrangea features large, round blooms. Lacecap hydrangea – Large flowers surround smaller buds with the appearance of being only half bloomed for a lacy, delicate look. Tree hydrangeas are pretty easy to grow and can thrive in a wide range of conditions. They can grow in areas with more pollution, such as cities. These plants can also grow in areas with salty soil, meaning they can be grown on the side of roads. The average growth rate is 25 inches (63 cm) per year. Hydrangeas grown from seed will bloom their first or second spring. Hydrangea Flower Seeds Bobo - Dwarf Hydrangea