Deer around here tend to leave forget me not flowers alone.
I have a few forget me not flowers in a garden bed out back in my yard and we have deer around and although they tend to eat some other flowers the deer leave the forget me not flowers alone.
My neighbor also has forget me not flowers and the deer stay away from those as well.
Either way I'm planning on putting a privacy fence in my backyard because although I love the deer I do not love the deer eating my other flowers and plants.
But yes deer should leave your forget me not flowers alone.