The only deer repellent I know of, that actually works, is a homemade mixture of:
1 quart water
1 egg yolk (I put the whole egg in)
1 tablespoon baking POWDER
Run through the blender until well mixed.
Let sit until the bubbles settle down. Pour into spray bottle and liberally spray all your plants and flowers. Use extra on plants deer love, like my roses! It is not a perfect solution (pun intended – lol) but does help and is non-toxic to any life form. I advise you to give up any idea of growing tulips with deer around. They adore tulips!