Quote:
Originally Posted by villagetinker
IMHO, then do not look bad at all if the grass grows inside the donuts and this does NOT hurt the operation of the sprinklers.
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I'm sometimes away from my place in TV for up to 3-4 months (summer) and I have definitely found a few cases where the grass has overtaken the donut to the point where the sprinkler head is not popping up fully and I had to pull out the excess grass that has expanded into the inside of the donut. For maintenance, I use Roundup every few months on the inside of the donut. I have St Augustine grass.