WEBINAR Taught by Patrick and Margaret Spence, owners of Cascadia Iris Gardens. Join us for an educational overview of three favorites at Cascadia Iris Gardens: lilacs, peonies and iris. Lilacs are fragrant and easy to grow, while peonies are long lived and gorgeous, and irises are diverse and glorious. Cascadia Iris Gardens features the genus Iris, but also has an extensive collection of peonies and lilacs. $10.50 BBGS Member/$15 Non-Member.