"Chris Hogg" wrote in message
...
On Thu, 11 May 2017 13:37:49 -0700 (PDT), DICEGEORGE
wrote:

but surely if i mow a lawn without collecting the cut grass so the cut
grass lands on top of the grass then it rots down into the earth so no
chemicals are lost so it will grow forever?
george

That is the principle of a mulching mower. Chopping the clippings fine
in such a mower ensures they break down rapidly and disappear. Leaving
the clippings from an ordinary mower on the surface is generally
frowned on, and dire consequences are predicted,

Only by fools.

although just what those consequences are, I'm not sure.
I think a lot of them may just be OWTs. I think clippings
left on the lawn just look unsightly.

They arent there for long.