It is important to disinfect your dog's yard every now and then to prevent the build up of bacteria and mold which could harm your pet. If your dog has recently had a contagious illness, such as parvovirus, you will need to fully disinfect the yard before letting your dog back out, or you risk reinfecting it.
Clean up any dog droppings using a plastic or metal shovel which should be thrown away or disinfected after use. Dog feces contain a lot of bacteria, so gloves are advised.
Remove dog toys and bedding. Wash anything that is washable on the highest temperature suitable for that material, and preferably wash everything on its own.
Hose your yard down with water, making sure you spray everywhere. While water does not kill bacteria, it will make the cleaning process easier and disperse bacteria out for easier treatment.
Spray the yard with a disinfectant safe for use with animals. An example is Johnson's Clean and Safe Trigger Spray, which is safe for use with all animals. Cover the garden completely, and any toys or equipment that are not washable.
Hose the garden down with water again after waiting the recommended amount of time for the disinfectant to work.
Allow the garden to dry before putting your dog's belongings back.