In April of every year, HPSO sponsors an event that is one of the largest of its kind in the Pacific Northwest. Vendors from far and wide – from nearly the Canadian border to the California border – come to Portland to offer the latest plant introductions as well as the time-tested (and hardiness-tested!) plants. Complementing the plant vendors are specialty garden art vendors bringing one-of-a-kind pieces made from metal, wood, glass, ceramic, fabric, and stone. Each work of art is handcrafted by the vendor.