Get a balanced lawn fertilizer that contains Nitrogen, Potassium and Phosphorous 16-16-16. There are many quality fertilizers available both with and without weed killers.
- Nitrogen (N): Gives your grass a dark green look. Too little and your lawn is yellow green and anemic looking. Too much and you will burn it.
- Potassium (K): Helps your lawn with root development and to fight off disease and drought.
- Phosphorous (P): This also helps with root development.
Fertilizing should be done in March, April, May, June, July, September and November in the Portland, Oregon region.