On Jun 17, 8:59?am, "symplastless" wrote:
What I prefer top use as mulch is composted tree trimming that have gone
through a chipper. Composted at least a year. NOT FRESH CHIPS.

Composted organic matter is called "humus". Humus is excellent for
amending soil by mixing in and/or to use as a thin top dressing but is
not a good medium to use as mulch. Humus is much too dense a medium to
apply more than one half inch deep as it will prevent air from
reaching roots and will even prevent water from seeping through, but
it will not discourage weeds, in fact humus will encourage weeds.
Humus is not an acceptible medium to use as mulch.