Re: CULT: toxic Canada thistles?
- Subject: Re: [iris-talk] CULT: toxic Canada thistles?
- From: J* B*
- Date: Mon, 1 Oct 2001 09:22:40 -0400
I would agree that it was possible. We did not allow the thistle
to get more than 8" tall before removing it. The bad thing about
thistle is that simply pulling it leaves a bit of root that sends
up another thistle, or if it breaks off in the right place sends up
a double stalk. We try to get thistle out while it is young, since
a mature thistle can stick you even through fairly tough gloves.
The irises did not grow well even after pulling out the thistle, which
was an ongoing task.
The other thing that made me think toxin is that in the lawn between the rows, where we just
let the mower cut it down, the grass thinned out wherever a thistle was growing.
The row in question is next to the neighboring property fence line. Our heavy infestation was
the result of the seeds falling in a concentrated area when they hacked down the thistle. At least
that is my guess why that particular area has so much thistle,
Is it not possible that the effect is simply due to robust competition from
the thistles and shading of the clumps by their vigorous growth? While many
plants do produce inhibitors, I don't recall this being said of Canadian
thistle.
Bill S.
[Non-text portions of this message have been removed]
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