Salt can also intensify the effects of drought, and vice versa. Avoid using salt around your trees. When planting in areas which may be exposed to salt, choose trees more tolerant to salt. Use pesticides and fertilizers around the home with care. Stick to the recommendations on the label.
Weed killers can kill trees.
Herbicides which are mixed with turf fertilizers should not be used near trees. The herbicide can be absorbed by the tree roots in toxic amounts, especially after heavy rains. Recently transplanted trees are also especially susceptible to herbicide injury. Choose your chemicals wisely and use them properly. Improper tree planting can also cause problems.