Aegopodium
(Bishop's Weed) - rampant, voracious spreader.
Euphorbia
(Cushion Spurge) - not
ugly really, just self-sows everywhere and impossible to remove;
tough woody stems that have to be pruned back each spring.
Phooey.
Anthemis
(Golden Marguerite) - sowed
itself everywhere, rather stinky too.
Mentha
(Mint) - one little snipped cutting five years later is
a 15 square foot plot of MINT.
Stachys
(Lamb's Ears) - if allowed to go to seed, you will have
it everywhere. Bees seem to love the blooms although they
are nondescript.
Sedum
spurium - if you like a sedum that will take over the
cracks in a flag patio or walkway, this stuff will do it.
Vinca
(Trailing Myrtle) - what was supposed to be an annual
vine took over a 20' length of raised bed; it comes up every
year. Who knew.
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