Dog Urine Damage to Climbing Roses and Evergreens: Nitrogen Burn and Behavioral Challenges

Three climbing roses planted last spring, beautiful all summer. This spring appear dead. Neighbor's dog urinates on them and on boxwoods/arborvitae (also dying). Asked if urine kills roses and prevention.

Nitrogen Overload

Urine = concentrated nitrogen. Small amounts fertilize; constant application burns roots (fertilizer overdose). Water heavily to flush. Deterrents may increase marking (dog tries to overmark).