Frogs are often attracted to garden areas when there is an abundance of insects or a pond for them to dwell in. Also, if you live near a large pond, bog or lake, you may have an infestation of frogs in your yard that can become a nuisance. Dogs may try to eat the frogs and get sick from poison the frogs release. First try to use organic methods to safely keep the frogs out of your garden instead of using strong chemical to kill them.
Remove food sources for frogs from the garden, such as insects. Apply insecticide if necessary so the frogs have no reason to scavenge for food in your garden.
Remove any slugs that you find and try to redesign any areas of your garden that are often damp. For instance, add pine mulch or pebble rock to damp areas near a pond or add dirt to fill in places where water collects in your garden.
Remove any logs or stacks of wood near your garden. Also, remove any tall weeds near the area or any place frogs could use for shelter.
Add a chicken wire fence around your garden or pond area by simply pushing fencing into semi-soft soil. Make sure the fence is at least 2 feet tall and buried six inches into the ground to prevent the frogs from entering.
Add a 1 cup of vinegar and 1 cup of salt water to a spray bottle and shake the bottle to mix the two ingredients. Spray the mixture around your garden to deter the frogs. Apply this at least two to three times a week and any time after it rains.