Potty. The reason you lawn is bad is because you mow it and take away nutrients (nitrogen) that grass needs with the mowings.
Weeds have deep tap roots and can get what they need from deep down. Mow regularly and fertilize with high nitrogen fertilzers. Check the Ph is around 7.5. Coarse grass & weeds likes lower Ph. Add lime if needed. If your soil is light, it will be acidic. Kill remaining weeds with spot treatment weedkiller.
Well since he wants grass there again, why is this a problem?
Birds don't eat grass seed, it's got a bad flavour added to it.
How would it do it without human intervention?
Don't believe you.
Get a robot one then.
Easier to do what I do and just pile them up on the draining board. When it looks like about a full load, I put them all in at once, taking the clean stuff out at the same time. Doing things in bulk is more efficient.
I use two pellets, gets things clean after sitting about for 4 days.
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, 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.
In message , Chris Hogg writes
Persistent mulching might be OK if you vary the mowing route. For long, narrow strips a mulching mower gathers the stuff into a strip where it can damage the grass as it rots.
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