[jetpks]

i tried this with the 50 foot sycamore in my back yard and the leaves didn't decompose at all. they fell and froze. then in the spring when things thawed out, they formed a thick wet mat that suffocated and killed everything underneath.

[offtrail]

Your lawn doesn't have a healthy fungal community. Probably because of lack of diversity in you lawn from years and years of pesticides, fungicides, and fertilizer use.

[votepaunchy]

One can walk in an Eastern deciduous forest and see that the leaves never fully decompose, despite the lack of pesticides, fungicides, and fertilizer.