I've never found them particularly inclined to regrow from bits of root so as long as you get them mostly out they are gone, IME. They do self seed quite freely, or at least some do. The fancy cultivars don't
Gardening on the edge of Exmoor, in Devon
“It's still magic even if you know how it's done.”
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Oh sorry
I've never found them particularly inclined to regrow from bits of root so as long as you get them mostly out they are gone, IME. They do self seed quite freely, or at least some do. The fancy cultivars don't
“It's still magic even if you know how it's done.”