Posted: 16/05/2012 at 08:25
I cleared a bed of old roses and herbaceous perennials of ground elder by planting geranium endressii - probably "wargrave pink".It grows so rampantly that it will smother and kill most weeds.Even nettles struggle to compete with it.It would probably be best to move any more delicate perennials you wish to keep before planting.
