"Bob Hobden":
And , I doubt they will come true from self sown, I've yet to have a true
purpurescens from a self seeded plant, they all come up green in my garden.
(Even from the one you gave me Sacha) Had one grow from self sown seed in
the front garden that took over a whole corner during last winter and I only
pulled it out this spring. Must have survived some mild frosts but it
flowered consistently. It has seeded as there are now a number of seedlings
appearing.

Am i right in thinking that they go bluer if in full sun? I have a few
plants also from Sacha's seed (thanks Sacha) and they are not
particularly "purpurascens" but are in part shade. Might be worth an
experiment!

Pam in Bristol

And these were so beautiful last year :-((
Still, they are in full sun (a rare commodity in our garden), so if your
theory is right, Pam ...

--
Klara, Gatwick basin