This week most of the maples on our
street dropped their leaves, and the oaks' leaves are starting to fall. This is
the last burst of glory before the bare gray and brown landscape of winter sets
in. It’s time to make leaf mulch.
Last leaves |
When
we bought our house thirty years ago and moved to the suburbs, I imagined that
I would let fallen leaves lie on my beds through the winter as mulch. This worked
around the fence line, but in more open areas, the leaves wouldn’t stay put. I
quickly sensed that neighbors were not happy when leaves blew over from our
property to theirs. Local custom demands that yards be absolutely leaf-free
going into winter.
The
reason to use leaves for mulch was not just to divert them from the waste stream.
I wanted to keep falling leaves on our property so that nutrients the trees
pulled from the air and soil to make foliage could stay here and be recycled. I
know that some people have luck grinding up leaves by running a lawnmower over
them. This never worked for me, and anyway, I wanted to spend as little time as
possible behind the gas-powered machine we used at the time. So I invested in a
leaf shredder.
This
electric tool is essentially a string trimmer in a drum. Whirling plastic
filaments chop the leaves, and they drop down into a barrel, a bag, or directly
onto the soil where they’re wanted. To use the leaf shredder takes some effort,
plus goggles, a mask, and wrist-covering leather gloves. It’s loud, and it makes
a lot of dust. The plastic filaments wear down and have to be replaced
frequently. Sticks clog the drum, so they have to be picked out of the leaves
as I feed them in. Leaves that are wet, or even damp, are much slower to process.
Yet despite the drawbacks, hours
spent feeding leaves into the drum prove well worthwhile. The chopped leaves
make pleasant, fluffy brown mulch that looks neat and stays where I put it.
Conventional garden wisdom warns against piling mulch against a tree's trunk lest voles or other small animals chew through the bark in winter. That's never happened in my yard. |
The
leaf mulch lasts for at least a year and improves soil quality by contributing
organic matter as it decomposes.
Last year's mulch, almost fully decomposed |
Now I’m in the strange position of not
having enough tree leaves. I need more to make the amount of mulch I want. I
ask neighbors if I can carry away some of their leaves. They humor me, but they
sometimes give me quizzical looks. They don’t know that they’re giving away the
garden equivalent of manna from heaven.
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