TOM KAN PA wrote:

You remember the anecdote about the thermos, you put a hot liquid in it, it
keeps it hot, put in a cold liquid, it keeps it cold. HOW DOES IT KNOW WHAT TO
DO????
Wood mulch, it *keeps weeds from growing*. So you spread the recommended 3-4
inches to keep the weeds down, but any perennial under the mulch will return.
HOW DOES IT KNOW WHAT TO DO???

The perennial is an established plant; the weed is typically
germinating from seed. It's the struggling up through 3-4 inches
of mulch, trying to establish a root system and grow leaves at
the same time that does in the weeds.

Chris Owens




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