|Dog urine damage leaves a dark green edge |
around the damaged brown spot caused by the urine
|Most likely there is a popup sprinkler in the center of that|
green patch surrounded by bare soil. It is most likely
a two inch popup when a four inch is needed in tall fescue
A. The third picture, brown ten inch circles with dark green on the outside, looks like damage from a urinating dog. Urine results in a small round brown area where the grass is darker green around the dead spot. Readers can see these pictures by following my blog at http://www.xtremehorticulture.blogspot.com/
|Popup sprinklers need clearance over the grass |
if they are going to cover the lawn area evenly
The other picture with 10 to 15 inches of bare ground around a green area, looks like the sprinkler head is in the center of that small green area next to the curb. If that is the case, I am guessing the popup is not “popping” high enough. Make sure it pops up all the way and is not getting blocked. Make sure your irrigation sprinklers are 4 inch and not 2 inch popups. Two inch popups do not pop up high enough to spray evenly above the top of a grass mowed at two inches in height. The grass height interferes with the water spray.
Your tall fescue does not look very luxurious in general. It would improve from some good lawn management practices. Tall fescue is best if mowed no shorter than 1½ inch, and 2 inches is even better. Use a mulching mower and return the clippings to the lawn; don’t bag them and leave them for the garbage.
|Roots of turfgrass grow easily into holes punched in |
the lawn by an aerifier