How do you kill invasive Oxalis?

Tim Eck via pbs
Mon, 12 Oct 2020 04:38:43 PDT
How about sending some to the BX with the warning that they are invasive
above zone 6 or 7 or whatever?  I assume they came from the BX and are
somewhat attractive.
If that isn't acceptable I will pay postage for a medium flat rate box.
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