Answer
Yard sign materials such as corrugated plastic, aluminum, and ultra metal, are the best materials for placing a sign in your yard. These materials are more rigid and easily supported by a
sign frame (or wire stakes for corrugated plastic signs).
If you still wish to place a vinyl banner in your yard, you can contact your local hardware store for ideas on how to secure the banner with materials like yard stakes or poles, bungee cords, and zip ties.