Dead flower heads on the buddleia are looking scruffy. As it's a pretty tough plant would I be doing any harm if I cut the flowering stems back at present?
I know to hard prune in spring.
None whatsoever, good infact as it helps prevent the spread of their seeds.
Hi KT53. After flowering I cut my Buddleja back by 2/3rds and then, like you said, they get cut back to 30 cm in Spring and I also remove some of the older, gnarly braches completely in Spring.
That should have said 'branches'!
I do the same as Ladybird - if I remember
I often just prune odd branches back (at any time) if all the flowers are completely gone from them. It keeps the shrub in shape too.