Invasive garden plants

    The boss has threads about annual and perennial weeds but I would like to see a list of plants to avoid, the thing that has given me the biggest problem over the past two years is an invasive flowering plant, considered by many, myself included till last year as a nice plant to have in the garden, its one that now to me is well named, crocosmia Lucifer, a tall plant with upward facing red flowers, last year it became a bit of a problem so I thinned it out or so I thought,this year it completely swamped my flower beds     the photo shows one of the areas where I had left it but unfortunately it got too vigorous and was smothering all the other flowers so it had to come out I finished up digging out three recycle bins full of it and having a look round the garden today I have more digging out to do      there is also a couple of clumps of monbretia which are absolutely solid so they are coming out as well w and the bulbs on show came from underneath an apple tree I removed yesterday  is there any plants you would advise not to plant