Reposting deer repellent post from four years ago.
Bad Ass Deer Spray Recipe:
There are many recipes for homemade deer spray online. Here’s how I make it.
4 raw eggs
1 tablespoon or more of hot sauce, the hotter the better
1 teaspoon dish soap and 1 teaspoon of vegetable oil
2 teaspoons of garlic juice or garlic powder
2 teaspoons of white pepper
1. Blend all ingredients in a blender with a quart of water. It helps to strain it before putting it into your sprayer because it will clog it, which is really annoying.
2. Pour in a gallon sprayer, add more water to top it off to a gallon and let it sit out of the sun for a couple of days so it gets good and smelly.
3. Spray your plants with a fine mist to coat all the foliage and flowers.
4. Respray new growth and after it’s rained.
I no longer measure anything out because I make gallons of this stuff every season. I use it on my gardens and all of my client’s gardens as well. I think the secret is to switch it up a bit from time to time, because deer will get used to the spray after a while and it won’t be as effective.
So you should add things like a few drops of clove oil, peppermint oil, cinnamon oil, or 1 cup of milk, etc. to change the smell and taste a little. I’ve been adding a sliver of Irish Springs soap to my batches lately and this seems to work really well. I find that the deer may take a bite here and there, but after tasting the spray they move on.