It’s nearly the end of February, there is still frost at night and some of the plants look shabby… Before I can see where the weeds are, I need to ‘tidy up’.…
They are marginally frost hardy to frost tender. Grow them in medium, well-drained soil in full sun or at most partial-shade.
You can propagate from seed in the autumn or spring, from stem cuttings in summer or autumn. When sowing seed, you should cover it with black plastic after sowing, and let them germinate in the dark.