Lawn maintenance through the seasons

Start with three basic checks

Look at sunlight, soil moisture and traffic before buying products. Grass that stays wet, grows in dense shade or is repeatedly compacted needs those problems addressed. A soil test helps identify pH and nutrient needs; a yellow lawn does not automatically need every fertilizer ingredient.

Spring: rebuild healthy growth

1. Sharpen and mow. A typical local cool-season lawn is kept around 2–3 inches; use the recommended height for your mix. Remove no more than one-third of the blade at once. Leave ordinary fine clippings.
2. Fix thin areas. When the ground is workable, core-aerate compacted areas, overseed with a suitable mix and lightly top-dress. About ¼ inch of screened compost is a common light application; do not bury the grass.
3. Feed if needed. Choose an appropriate lawn product and follow its rate. Use soil results for phosphorus and lime rather than adding them automatically. Sweep spilled granules off paving.
4. Test irrigation. Clean nozzles, replace damaged heads and check for dry strips or overspray before dry weather arrives.

Summer: water for roots, not runoff

An established green lawn may use roughly 1 inch of water per week during dry weather, including rain; actual need varies. Water early, inspect soil moisture and break watering into cycles if runoff starts. Put several straight-sided catch cups across the lawn to see whether water is distributed evenly. Shade usually needs less than hot, exposed areas.

Measure output instead of guessing minutes. If a zone applies 0.25 inch in 15 minutes, an example 0.5-inch watering would take 30 minutes, possibly split into cycles. Never apply that schedule blindly to new seed or sod. Follow local watering restrictions and adjust for rainfall.

Fall: repair and prepare

1. Overseed while growing conditions are suitable. Early fall is often useful; allow time for establishment before cold weather.
2. Feed according to need and label. Avoid spreading fertilizer before heavy rain or onto saturated ground. Check the product’s use limits.
3. Remove leaf mats. Small amounts can be mulch-mowed; thick wet layers smother grass.
4. Prepare irrigation for freezing. Shut down and winterize using the system’s method. Compressed-air blowout needs suitable equipment and experience.

Winter: protect the soil

Limit traffic on frozen or waterlogged grass. Keep drain inlets and swales clear. Service the mower and plan spring repairs. If a patch remains wet for weeks, investigate drainage rather than repeatedly adding seed.

How much fertilizer is that?

The first number on the bag is the percentage of nitrogen. If a recommended application is 0.5 pound of actual nitrogen per 1,000 square feet and the product is 20% nitrogen, that equals 2.5 pounds of product per 1,000 square feet. This is arithmetic, not a product recommendation; use the label and your soil results. Avoid using weed-control products where children, pets or new seed would conflict with the label.

Troubleshoot before treating

For a full restart, see planting a new lawn.