If you have both deer and plants, you may want to protect your plants from those deer eating them. Here is an Amish recipe for deer repellent.
4 hot peppers (or enough to make it really hot)
6 to 12 cloves garlic (enough to make it stink)
5 c warm water
Put all the ingredients into a blender and liquify them. Pour into an old gallon milk jug. Set it outside in the sun for a couple of days to let it cook and get really stinky and hot. Strain it well if you want to use it in a sprayer. You could just pour it on and/or around the plants directly from the jug.
Keep your fork