In article , Rosie
writes
I've got a border which is full of very large verbascum olypicum.

Trouble is, all the lower leaves are starting to get white spots which look
like some kind of mould.

A few weeks ago a borage in the same spot had this happen and I destroyed
it.

Do I need to destroy all the verbascum? Should I put anything in its place
or leave the area for a bit?

If you think it's a mould, it could be mildew, which, paradoxically, is
worse if the plant isn't getting enough water. Try watering it.

I think it's a surface thing not a systemic thing, so removing affected
leaves should be enough - no need to destroy entire plant.
--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm