Like politics, all lawn care in America is local—well, let’s make that regional. But you get the point. Consider the differences in turfgrass growing conditions from Cleveland to Miami to Oklahoma City. Each region is markedly different in seasonal temperatures, precipitation levels, soil types and the dominant turfgrass species most suited to their unique conditions. In other words, when it comes to fall fertilization, one size does not fit all. Lawn fertility regimes that benefit turfgrass in one region are wasteful and may even harm lawns in another. Also, soils in different regions of the country (even soils within a single region or market) may differ in terms of soil pH and plant-available nutrients such as phosphorus and potassium. Don’t guess. If you don’t know what’s in the soil, how can you accurately prescribe a fertility program that’s most beneficial to the turfgrass it supports? When in doubt rely on soil tests to show you the way, especially for new or struggling properties coming under your care. Personnel at your county extension office can help you with advice and soil tests. In many cases their services are free. Read about Soil Test Reports from the Winter 2020 Issue of Turf. Now’s the time to fertilize. Let’s start with the birthplace of modern lawn care, the Northeast and Midwest where cool-season grasses such as Kentucky bluegrass, perennial ryegrass and tall fescue dominate residential and commercial properties. If you can only fertilize these cool-season grasses once a year, do it in ...