Deer have a strong sense of smell, which they use to find accessible food sources. While there is no scientific evidence that coffee grounds will deter deer, the bitter smell of spent coffee grounds may signal to deer that humans are nearby and keep them away from your property.

What smells do deers hate?

Deer have a heightened sense of smell, which they use to effectively find food. You can take advantage of this trait and repel deer by using smells they dislike, such as marigolds, putrescent egg solids, mint, wolf urine, tansy, garlic, thyme, oregano, sage, rosemary, and lavender.

What is a good homemade deer repellent?

5 DIY Deer Repellent Recipes