Spring Lawn Care Checklist

Don't rush spring lawn care. Wait until nighttime temperatures are consistently above 40°F and the soil has dried enough that walking on it doesn't leave deep footprints. Working on waterlogged spring soil compacts it and crushes new grass shoots. In most of the northern US, this means mid-to-late April.

Use a dethatching rake (spring-tine rake with curved blades) to vigorously rake the entire lawn, pulling up matted dead grass, thatch, leaves, and winter debris. Work in multiple directions. A thin layer of thatch (under 1/2 inch) is beneficial; anything thicker blocks water and fertilizer from reaching roots.

Healthy lawns thrive at pH 6.0-7.0. A basic soil test kit costs $15 at garden centers; your local cooperative extension service often provides free testing with detailed recommendations. If pH is below 6.0 (too acidic), apply ground limestone per package directions. If above 7.5, apply sulfur.

Rent a core aerator and run it over thin or high-traffic lawn areas. Core aeration pulls out plugs of soil (1/2-inch diameter, 3 inches deep), creating channels for water, oxygen, and fertilizer to penetrate to root level. This is especially important for clay soils or areas where water pools. Leave the plugs on the surface — they break down and return nutrients within 2 weeks.

Scratch bare spots with a hand rake to expose loose soil. Spread grass seed at 1.5× the normal seeding rate (check the bag for your grass type). Press seed lightly into the soil surface with the back of the rake. Top-dress with a thin layer (1/8") of compost to help retain moisture. Keep seeded areas consistently moist until germination — typically 5-14 days.

After the lawn has begun active growth (not before), apply a balanced slow-release fertilizer. Avoid high-nitrogen quick-release formulas in early spring — they push rapid top growth at the expense of root development. Follow package rates and apply when rain is in the forecast, or water immediately after.

Set your mower to 3 inches — the single most important mowing adjustment you can make. Taller grass shades out weed seeds, develops deeper roots, and stays greener longer in drought. Sharpen the blade if you haven't since last season; a dull blade tears grass instead of cutting it, leaving brown-tipped, disease-prone edges.