One home remedy to get rid of groundhogs, also known as woodchucks, is to plant a line of garlic near where the groundhog enters the garden. Alternatively, sprinkle blood meal or talcum powder around the perimeter of the garden. Hot pepper and human hair can also be used as deterrents against groundhogs.
Typically, the two most effective ways to get rid of groundhogs are to fence off the garden or get a dog. A physical barrier is the best way to keep groundhogs and other rodents from reaching your garden. It should be a fine mesh wire fence dug at least 12 inches into the ground. A dog will scare groundhogs away from your yard.
There are also a few home remedies for getting groundhogs out of burrows, such as pouring sudsy ammonia into them. On a warm day, pour about 2 1/2 cups of sudsy ammonia into each burrow. They will likely leave them immediately. If not, repeat the process after one day. Another approach is to fill the burrows with mud or clay cat litter.
Finally, the Havahart trap is a humane way to trap groundhogs. Once caught, they can be safely removed from the property or handed over to animal control.