@Mimi 1883 Since you don't have an area in your. yard where the squirrels can't jump to the feeders, you might want to get a Squirrel Buster Plus bird feeder. I have one of these right beside a tree. The squirrels used to jump to the feeder, but now they can't get the food.
This is a great feeder. When the squirrels land on it, the hole to get the seed closes up because of their weight. It works perfectly.

The Bluebird Carries The Sky On His Back"
-Henry David Thoreau