Put down broken pieces of ceremic, flat stones, anything they cannot get through.
Sprinkle "Blood Meal" around the base of the plants and they will not come.
take a knee high nylon put table spoon cayenne red pepper in it tie it closed and they will stay away
Get a bag of blood meal from the nursery, spread through garden. The squirrels don't like blood smell at all and it also is a mild fertilizer
River rocks! Place on top of soil. Choose a size that is too heavy for them to push aside. Any home improvement center sells different sizes in bags for a few dollars. Makes the plants look pretty too.
Thanks! I will try the blood meal and let you know if it worked