The top 10 unwanted garden plants

9. English ivy (Hendrix helix)
Gardeners often have a love hate relationship with English ivy. Spreading primarily through creeping roots and branches, this ground cover can create a living carpet or grow up any type of structure creating a lovely green wall of foliage. It may look nice in the garden, but when this ivy makes its way into a natural woodland area, it can quickly smother native plants.