Last year I had some plants decimated by deer, and wanted to be proactive and get ahead of the curve. So I set out to make homemade deer repellent with common household items. Here is a list of what you will need:
Peeled garlic cloves
So, put the garlic and cayenne pepper in the food processor to start your homemade deer repellent project. While you are doing this, boil a few cups of water, and prepare your container. I used an old water jug from the kids soccer days. Once the garlic and pepper is ground to a pulp for your repellent, put it and eggs (I used 3) into your container. Whip up the eggs so the yolks break, and pour in the hot water into your repellent base. Stir the mixture well, and put about 5 drops of liquid soap into the mix. Cover the container, and shake it to mix. Let this sit for a few days.
To use your newly made deer repellent, open your container, and be prepared for the stench, and use cheesecloth or a paint filter to fill up a spray bottle about a quarter of the way. This is highly concentrated, and you can make it go a long way if you dilute it. Fill the rest of your sprayer with water and shake. Apply this to your plants, and repel all your furry enemies. This concoction is also good for: rabbit repellent and grasshopper repellent.
Be sure and reapply after the rain!