Ready, Set, Bloom! Bloomingmore's limited edition USA Peonies are finally here! Have fun exploring our variety of beautiful colors and ruffled blooms. Our USA Peonies are perfect for weddings and other summer occasions. These stunning flowers are seasonal, they start to bloom in late spring/ early summer, although the timing varies depending on the type of peony. Since Peonies are seasonal, they will not be available online when out of season.