Open gardens: The Cecil and Molly Smith Rhododendron Garden, which features 600 of species and hybrid rhododendrons and other plants, will be open Saturdays and Sundays, 11 a.m. to 4 p.m. April 6 through May 19, 5055 Raybell Road NE, St. Paul. $3 admission, free for American Rhododendron Society Members. 503-625-6331.