[header] How to keep dogs out of flower beds [title] Fence in your flower beds. [step] This should send a message to your dog, or other dogs in the area, that he or she is not allowed in your garden. Ensure that the fence is sturdy and tall enough so a dog can't simply push it over or jump over it. 
[substeps] Many times dogs simply wander into flower beds because they are just areas that are easily accessible. Simply making access more difficult with a short fence will deter many dogs from entering.