Question: We fertilized our lawn last week, and now we’ve had a really heavy rain. Do we need to feed again?
Answer: No. If you used a quality slow-release fertilizer most of it should stay in place. In any event, it takes longer than one week to assess the impact a fertilizer would have on your turf. Watch it closely over the next four to six weeks, and fertilize when its growth slows and color pales. Water departments suggest that we try to time our feedings in dry times, not just ahead of expected big rains. That will lessen the nutrient runoff into our lakes and rivers. Be sure, too, that you sweep the walk and drive after you fertilize. Not only will you prevent staining of the concrete or brick pavers, but you’ll also prevent all that fertilizer from washing into the storm sewers.