In article ,
"'Mike'" writes:
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| What would make a perfectly healthy Buddleia suddenly die within a month?
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| Everything else around it OK

Some sort of root-rot. That has happened to me, twice, with buddleia,
and several times with other plants. Usually, digging it up and
looking under the bark shows evidence, but there is no way of telling
whether that is primary or secondary.


Regards,
Nick Maclaren.