Late April is the first real fertilizer window for Central Ohio lawns. If you skip it, your grass goes into summer heat without the nutrient reserves it needs, and by July the lawn looks tired and brown at the tips. If you do it wrong, you feed weeds instead of grass and pay for extra mowing all May long. Here is what to apply this week across Circleville, Columbus, Lancaster, and Chillicothe — and what the wrong choices look like. The number that matters: nitrogen ratio Ever