Posted: 22/05/2017 at 11:43
IMO / experience.
Seeds will not come true, but may well be viable. [ once they are ripe. They need to be left attached to plant, to achieve this ]
Cuttings will work.
Cutting them back, as long as plant has plenty of leaves, may work, but they will tend to flower earlier and not give a long Spring display.
Last edited: 22 May 2017 11:44:06