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Did we get them from the same source ?Do you have the other subsp. ?
Armins plants don't have the white style which is only present in HKEP9205.Great photo, by the way Andrew. Better than my own photos of this plant.
Yes C speciosus - nicely naturalised by the look of it.
C. aleppicus is in flower now, it has many different forms, each typically to its geographical location.
Anything I can grow you ought to be able to grow better!
I would guess that aphids cannot overwinter so easily in your climate as they do here where hard frost and snow are increasingly rare.