Deer will almost always stay away from plants that offend two or more senses. Therefore, if a plant tastes and smells offensive deer will avoid the general area it's planted in. Deer resistant gardener use's this knowledge to their advantage.

The best combination we have found is:

 Deer Repellent Kit and Tree Guard and Deer Chaser

Using two products will activate the sense of smell and taste and encourage the deer to move on to more attractive foliage (hopefully not your neighbors) You can learn more about or purchase these products at the  Deer Repellent Department