The Knot Garden at Hampton Palace Gardens, Hampton, England. Hampton Palace was home to many of England's kings and royalty from the beginning of its construction in 1514 until Queen Victoria opened the castle and grounds to the public in 1838. In this photo the annual flowers amidst the backbone English boxwood (Buxus sempervirens) hedges are red semperflorens begonias and dusty millers (Senecio cineraria).