Table 1 lists plants and their susceptibility to deer damage. Also, a plant species may be damaged rarely in one area but damaged severely in another. The two types of deer repellents are contact repellents and area repellents. Contact repellents are applied directly to plants, causing them to taste bad. Area repellents are placed in a problem area and repel by their foul odor.
Repellents are generally more effective on less preferred plants.
Apply repellents on a dry day with temperatures above freezing. Treat young trees completely. Older trees may be treated only on their new growth. Treat to a height 6 feet above the maximum expected snow depth. Deer browse from the top down.