Unless you are growing Zoysia grass or Bermuda grass, spring is NOT the best time to fertilize your lawn. The University of Maryland recommends that you do not fertilize your lawn in the Spring at all, unless your turf is weak and thin. Even then, the recommendation is to apply NO MORE than 1/2 pound of nitrogen per 1000 square feet of lawn before the end of May. If a home owner applied what fertilizer companies tell us to do, we would apply about 1.75 lbs. of nitrogen per 1000 square feet by the month of June. THAT IS THREE TIMES MORE THAN THE RECOMMENDED AMOUNT!