On March 27, 1912, US First Lady Helen Taft and wife of the Japanese ambassador Viscountess Chinda Iwa planted two Yoshina cherry trees on the northern bank of the Potomac River. The plantings were in celebration of the Japanese gift of 3,020 cherry trees to the US government.
On July 14, 1932, the International Peace Garden was dedicated, representing the peaceful relationship between the United States and Canada. The park sits on the border between North Dakota and the Canadian province of Manitoba.
On August 23, 1969, the US Post Office issued a set of four stamps for the 11th International Botanical Congress (IBC).