When Should You Fertilize Your Lawn in Ohio?

In Ohio, fertilize cool-season lawns about four times a year: early spring (late March–April), late spring (May), early fall (September), and late fall (late October–November). The fall feedings matter most because that's when grass builds its roots.

The four Ohio feeding windows

• Early spring: a light feeding with crabgrass pre-emergent to wake the lawn up.
• Late spring: supports growth before summer stress sets in.
• Early fall: the recovery feeding after summer — pair it with aeration and overseeding.
• Late fall: the most important application, storing energy for a strong spring green-up.

Can you over-fertilize?

Yes. Too much nitrogen, especially in summer heat, can burn the lawn and encourage disease. Correct timing and the right amount matter far more than simply applying more product.

Get the timing right, automatically

Our fertilization program times every application to your grass type and the Southwest Ohio season. See our fertilization service or call (937) 748-9431 for a free estimate.