There are a couple of chemical-free deer-repellent recipes you can use. For the first one from Talk Leisure, crack open two raw eggs and mix them together in a bowl.
Then, combine the mixture with vegetable oil, cinnamon oil, hot sauce, milk, and dishwashing detergent. To make it more sprayable, add water before pouring it
A second recipe from Borst Landscape and Design requires you to mix a teaspoon of dishwashing detergent, one tablespoon of cooking oil, and a cup of vinegar in a bowl.
Don't spray it directly on vegetables, fruit, or anything you'd eat, and make sure you stay on top of reapplying the repellent every few days and after windy or rainy weather.