|My lawn is 20 years old wnat should I use to keep the weeds out and a green look?|
|Your best defense agains weeds in the lawn is to grow a healthy, thick turf. Feeding regularly, watering deeply and mowing often will help your turfgrass grow thick and lush. Feed your lawn in April, June, September and late November. There are three primary nutrient elements that plants need: nitrogen (N), phosphorus (P), and potassium (K). A ?complete,? or ?balanced,? fertilizer contains all three elements. When you look at bags or containers of fertilizer you usually will see the percentage of each element listed as a number. For example, if a 20-pound package of fertilizer has the numbers 15-10-5, the package of fertilizer contains 15 percent nitrogen, 10 percent phosphate (phosphorus), and 5 percent potash (potassium). That is, it has three pounds of nitrogen: 20 lbs. x 15% (.15) = 3 pounds. It has two pounds of phosphate: 20 lbs. x 10% (.10) = 2 pounds. It has one pound of potash: 20 lbs. x 5% (.05) = 1 pound.
If you want to apply this fertilizer at the recommended rate of one pound of nitrogen per 1000 square feet of Kentucky bluegrass lawn, you would use 1/3 bag of fertilizer per 1000 square feet of lawn.
If weeds are a problem now, use Vigoro Ultra Turf Weed and Feed to get a handle on them. Good luck with your lawn!