Verbascum olympicum can often get that height in the right conditions....if the Mullien moths don't get there first !!!!! lol

I wouldn't say size matters but............ mine is bigger than that. Over 9ft and I don't think it's stopped yet.

'OH no' i had no idea.... i found two mullien caterpillars on my buddleja a week or so ago, ive also got a olympicum but mines all foliage at the moment.... thanks Andy for that bit of info. ;-)

I bought some Verbascum chiaxii alba from a seed comp. I anticipaterd the white flowers with tiny purple centres. I was lucky to get a couple of the alba, but most were the plain chiaxii, yellow. I was late pulling them out of the border. They self seeded everywhere. I had one that reached 8'6" before the flowers opened. I pulled it before it had chance to grow taller.