The gardens were established by Hulda Klager (1863-1960), who began hybridizing lilacs in 1905. By 1910 she had created 14 new varieties, and in 1920 she started showing her lilacs every spring. She eventually developed over 250 varieties. After her death, the gardens were preserved and then organized into a nonprofit foundation in 1976.
Today the gardens contain more than 90 varieties of lilacs, as well as Victorian gardens and farmhouse.