I sowed some eryngium gigantum 'miss willmott's ghost' which was lovely and architectural , however i think that Miss willmott may be haunting me for sometime to come.
her offspring appear in cracks in paving, at the foot of walls and a rockery far from the original postion. As it biennial i can spot the ones growing where they shouldn't and pull them out when they in the leafy stage.
A bronze fennel plant that I rescued from the discount area of a garden centre has made me have some regrets. It was touch and go whether it would survive at one point but its offspring are very much full of vigor and hard to see against the soil.