Posted: 28/06/2013 at 13:04
RHS call it a shrub - it increases in size each year - also known as jerusalem sage.
Cuttings are easy at this time of year - trim of at a leaf joint and insert into a gritty mixture and then keep warm, but out of the sun.
As a bonus, the seeds sometimes germinate on top of the old flower whorls, looking most curious!
The the pink variety (sorry no good at names) is growing out here in the Languedoc and it is spreading at a rapid pace (probably suckers) - I'll have to dig up all the periphery bits in the autumn. The weather is a bit different - usually a three month period of drought in the summer followed my heavy rains in autumn and then a very cold winter. It is very reliable in the fierce summer sun!