 The prize vault is sponsored by Solid Rock Realtors, Petra Insurance, and Sooner Flooring and Design. This is, it's actually the largest free summer home and garden show going on in green countries. So come out and say hi to my buddy, Alan Storjohan. While you're out there on Saturday mornings, doing a show there from nine until noon, bring your gardening questions with you. 16th Annual Home and Garden Expo of Oklahoma at the Exchange Center at Expo Square, Friday through Sunday.