My girlfriend loves them, so I have bought 2 plants from the local garden centre, anyone got any advice on how best to make them flourish? :)
Never tried them myself... (bump) :)
I got three plants last year, they do like a hot sunny moist but well drained soil. I potted them up last autumn after the summer in the border, and kept them in the greenhouse. They survived the cold winter ok, I planted out again this May........and they curled up and died ::)
Thats all I can tell you Im afraid, probably best to renew plants every year or try growing from seed :)