Are you wondering
what those tall prickly weeds with the purple flowers are? They are thistle and
it's a good chance that one of your neighbors is responsible for it growing in
your flower beds without even knowing it.
As suburbia becomes
more "nature friendly" it has not only reduced trans fat intake
and/or its carbon footprint, suburbia has also taken to bird watching and
species conservation. This latter change comes at a heavy price for gardeners.
When many new age
conservationists fill their bird feeders with thistle seed in hopes of catching
a glimpse of a Fitch or Humming bird, they do so unaware that they're
broadcasting weed seeds over many miles.
Broadcasting is the
process where an animal consumes a raw nut/seed then deposits it into a new
location through its feces. The Nitrogen rich feces then forms the perfect
growth medium for seed germination. In this particular case the destination for
the "broadcast" is your flower/vegetable garden.
This problem is
future exaggerated as "Round-up resistant" strains of this interbred
with their pure feed cousins, thus creating an ever evolving nuisance that will
not die when treated.
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