Nice article. Can I assume that the 'grows most in winter' will be reversed to grows most in summer in the UK (I am in South East England)? I put my swartzkopf out for the summer but brought it into a frost proof greenhouse for winter and scarcly watered in winter - was that wrong? It has become very leggy, lower leaves having withered. Is that because I kept it dry in winter? Should I chop off the top? What about taking cuttings - what's the best way? Thanks for your help.
leggy happens no matter what.. .but is more likely in low light... chop off tops and replant them. I water mine all year round, but more so when it's cool than when it's warm (though, is it ever warm there?). Cuttings can be taken with a knife, a clippers, or snapping off the branches where ever you like