By Spetz
United Kingdom 
I have a plant in the garden which is 8 feet high i want to know what it is and do i cut it back it the one in the picture with yellow flowers.
I have just been told by my neighbour it looks like a pereniall it is poss.
12 Oct, 2011
Answers
That's what it looks like to me, as well.
12 Oct, 2011
It is probably Verbascum thapus, can be considered a weed. As it is a biennial it will die off on its own. It could be a nuisance if it is allowed to seed around but if you like it collect some of the seed and sow it in a controlled manner.
12 Oct, 2011
Yes its a verbascum. You dont need to do anything . It will die back naturally in autumn and when it is finished cut it back then. If you like it collect some seeds and grow some more.
12 Oct, 2011
Could it be some kind of verbascum or mullein?
12 Oct, 2011