A homemade recipe for deer repellent recipe is below. But, it comes with the usual caveat that deer are not easily deterred if they are hungry.
This is something I use in the garden in an effort to hold back the predation of my tulips from the deer herd that seems to use this property as a walkway along the shore.
Take a gallon of water and two spoons full of latex white paint.
The use of latex white paint is to use the spreader/sticker in the paint so you want to add only a bit to the water. We want it to be a very, very pale water – not a very thin paint. You could also use two tablespoons of liquid soap.
The paint does let you see where you’ve sprayed and it does disappear very quickly
Add several eggs to the mix – up to a half dozen should be fine.
Apply to the plants to be protected as well as around the boundaries of the property.
The egg mix will go rancid – which is what you want but you won’t smell it.
The deer will.
They’ll avoid the area while the “fragrance” is new and fresh.
So do plan on renewing this every week or two or after heavy rains.
Buy a new blender and keep the old one for the deer deterrent recipe-making.
If you stop spraying or miss a spray – the deer will be back. I’ve been told that friends add other ingredients such as garlic oil, hot pepper juice etc. Things that change up the smell.
Some folks don’t like to make their own so here’s one of the most popular commercial products called “Liquid Fence” that I’ve used successfully in my own garden with my personal deer herd.
You may also want to read this article on deer psychology and how I moved my herd away from my garden There are also reviews for Liquid Fence as well as Plantskydd here