gavin wrote:
I know that dead heading certain plants will help promote new flowers - is
that true of Buddleias?

Yes, some people do say if you cut the old flowers in late summer it
encourages the smaller ones to come through. I however think that it is
more to do with a 'tidy appearance' to dead head buddleias rather than
promoting growth. We are often told to also cut branches off to yet
again 'tidy' and protect from wind damage. At the same time if you cut
too severely before winter, frost can get at your plant.

I like the various sizes we get on our 3 plants, with the most heady of
honey smell, and I only remove the long lanky stems to protect one of
my 3 plants from being attacked by grumpy passers by on the pavement. I
like the spikes in the winter (and the privacy it gives me) and the
birds feed on the seeds too. I then cut them severely in early March
and then let them do their stuff naturally )