Hi, As promised, some photos of the whole plant/s.
I have three very mature plants in various sizes goodness knows how old they are. The largest spanning about three feet.
Also in a pot, some very young plants growing from cuttings. As already mentioned, they are very easy to grow. (First Pic)
It is also very evident that they grow in a 'sprawling' manner, and this is because of them just being left to their own way. They ought really to have been grown in either a hanging basket or trained up a trellis of some sort, someone has already mentioned this.
I have a lot of admiration for these plants in spite of there obvious neglect, even the old wrinkly, spotted, dead looking leaves have new shoots and flowers along them.