wrote in message
...

Yes, whether it's cut a 3 or 4 probably doesn't make a lot of
difference. But it isn't advantageous to hold off too long either,
because when you cut the grass, it removes a hormone that is generated
at the leaf tips. That hormone helps regulate the growth of the plant
and with it gone, it encourages the grass to grow faster and spread
out.


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If this is true, it sounds like an excellent reason to let it grow long befor
you mow. You want it to grow fast and spread out.