Editing Weed control (section)

=== Subsurface/surface ===
The most persistent perennials spread by underground creeping [[rhizome]]s that can regrow from a tiny fragment. These include [[Elymus repens|couch grass]], [[bindweed]], [[ground elder]], [[Urtica|nettles]], rosebay willow herb, [[Japanese knotweed]], [[horsetail]] and [[bracken]], as well as [[creeping thistle]], whose tap roots can put out lateral roots. Other perennials put out runners that spread along the [[soil]] surface. As they creep they set down roots, enabling them to colonise bare ground with great rapidity. These include creeping [[buttercup]] and [[ground ivy]]. Yet another group of perennials propagate by [[stolon]]s- stems that arch back into the ground to reroot. The most familiar of these is the [[bramble]].