Fertilize

Fertilize established evergreen lawns early in the month when soil temperatures reach a consistent 50 degrees, if you have not done so already. This is usually when the Forsythia is in bloom. Use a high-nitrogen, low-phosphorus fertilizer like 18-0-4 that includes a pre-emergence weed control. It is best if the nitrogen is NOT in a slow-release form. It should be in a soluble form like ammonium nitrate, ammonium sulfate, or potassium nitrate. Apply at the rate of 1 pound of actual nitrogen per 1000 square feet. This application will last 4-6 weeks.
Do not apply pre-emergence weed control if you plan to seed an evergreen lawn this spring.