When it rains the deterrent may be washed away. In hot weather it may evaporate. When it rains the crystals absorb more water and grow, they are not washed away. Special surfactants help water and nutrients penetrate down to the roots of the grass, thereby stimulating plant growth. To temporarily mask the damaged area a green dye has been added as well.
Dog urine can often be a frustrating lawn care problem.
Small amounts may produce a green-up or fertiliser effect. Larger amounts often result in lawn burn or dead patches. Water thoroughly immediately after spraying. For a period of at least 5 days, follow up with frequent and thorough watering. Some lawns such as Kentucky Bluegrass are more sensitive to staining and require special care.