Taking an environmentally sensitive approach to pest management


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May Lawn Calendar

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Established lawns may be maintained at different levels of perfection according to individual situations and desires, but good lawns seldom "just happen." This monthly summary outlines major steps required to maintain a high-quality lawn year round. Steps in boldface type indicate a minimum program where time, money or interest dictates a usable lawn with least effort. Other selected steps of the schedule may be adopted occasionally or in alternate years to upgrade the program. Timing is approximate for central Missouri. It may vary two weeks or more from one area to another in the state or from year to year.

  • Do not apply nitrogen fertilizer, particularly quickly available soluble forms, past May 1 as it will encourage development of foliar diseases.
  • Apply postemergence broadleaf herbicides for summer weeds. If needed, start postemergence control of crabgrass, goosegrass or nutsedge near the end of the month. (See MU Extension publication IPM1009, Turfgrass and Weeds.)
  • Watch for first brood of sod webworm. Apply insecticides about 10 days after major moth flight

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    REVISED: May 13, 2020