Who invited them?
The title does not refer to weeds. Weeds are easily recognized for what they are and are not trying to fool you into believing otherwise. The barbarians, on the contrary, appear opulently cloaked and disguised to gain entrance into your garden. And the worst of it is that you invited them, providing space and opportunity to thrive! Thenceforth they are harder to be rid of than the legendary man who came to dinner. For the most part they are introduced through the pages of glossy catalogues emanating from everywhere except the South. Or maybe a garden tour of Europe raised expectations of what is possible in the Lowcountry. It is not news that, in the garden anyway, hope springs eternal.
At the top of this villainous list is the oft-touted Virginia creeper, praised for its stunning fall color adorning walls in England. If you fall for this blandishment, you will never be totally rid of it, as it pops up everywhere but never develops the promised fall color. Every excursion through your grounds will give you an opportunity to pluck out some of it. Well, you say, this is not England after all, but the Lowcountry of South Carolina, so how could one be so foolish?