Uneven coverage is a pattern problem. Adding minutes soaks the wet half and still misses the dry stripe. Run the zone and watch the whole thing before you change the clock. Coverage correction is built around that watch.
See every head rise
Let the zone run long enough to see each head pop up, turn, and stop. Note weak heads, blocked streams, arcs that hit the driveway, and low spots that flood. A head that stays down is a head repair, not a schedule issue. Mower damage is covered in broken heads after mowing.
Spacing and sunken heads
Many spray layouts assume one head reaches the next. A missing, tilted, or buried head leaves a dry band even when its neighbors look fine. Mature lawns in Kingwood bury heads under mulch. Raising them is part of evening the coverage.
Matched nozzles
Different nozzle families apply water at different rates. Mixed equipment on one station creates a bog beside a dry patch during the same runtime. Match them when you replace a head. Do not grab whatever is in the drawer.
Pressure
High pressure mists and drifts. Low pressure shortens the throw. On Dayton acreage, the last head on a long line is the one that shows it. Diagnose pressure before you only increase the minutes. A leak can steal the same pressure. If the zone used to be strong, read signs of a hidden leak.
After the landscape changes
New beds, fences, and patios in Porter and New Caney cut across old spray plans. Adjust the layout. Overpowering a fence with a longer runtime waters the neighbor’s side.
A yearly tune-up catches the small version of this. If the dry stripe has been there since the beds went in, request coverage correction and name the city on the form.