It’s in a huge pot on my patio but showing no signs of life yet here in central NC. Should I give up on it?
Keep in mind Foxglove doesn't start blooming till June, so it may simply be slow starting this year, especially if your temperatures have been colder than normal. There should also be plenty of space around it (at least 6" around the base of the plant) and good drainage.
Make sure it's getting the right amount of water, and here is an article that may help you continue to care for it: