Do you have laboratory soil test results you would like help interpreting? We do not have a specific minimum and maximum range for these particular nutrients for fescue or other turfgrasses. Instead, we can note from test result data when fertilizers containing particular nutrients would be beneficial (if there is a measured deficiency) and when they would not (such as when test results show levels are "optimum" or "excessive"). "Excessive" in this context does not mean levels have to be reduced; instead, it just means that there is so much available in the soil already that adding more in the form of fertilizer will have zero benefits to the plant and may risk polluting stormwater runoff since plants won't be absorbing any extra amounts.

Regarding pH, for turfgrass the optimum range is around 6.0 to 6.8, though a little outside of this (above or below) is fine and doesn't necessarily need adjusting, especially if trees of acid-loving species like maple or birch are being grown nearby where their roots infiltrate the lawn and would be impacted by a pH adjustment like liming.

If useful, we have a variety of lawn care and maintenance web pages (most of which focus on tall fescue as it's the most common turfgrass in Maryland) that provide more information on practices that help keep turf healthy and vigorous.

Miri