The Linnaeus Teaching Garden has never been more beautiful, with thousands of lush plants, gorgeous hardscaping, fountains and water features (never heard of it? Check out my post <a href="http://www.tashadoestulsa.com/2010/07/linnaeus-teaching-gardens-from-unsung">here</a>). At this celebration of the anniversary of the opening of this garden, the day will start with the first 500 visitors receiving a free, one-gallon repeat-blooming hydrangea, a $15 value. At 10:30am, check out a free lecture from Dan Helms, who has plant patents on many new perennials. Attendees get a free perennial. Plus, garden volunteers will be selling new annuals, many of which will be available for the first time in Oklahoma. Light refreshments and gardening advice and literature will be available throughout the day, too. Through 3pm.