We have lots of these plants in public gardens, they seem to grow like weeds here. They have flowers in different colours, but most are deep pink (at least here). This particular one got my attention because it has these two colours in the same plant. Curious. (At first I thought young flowers were lighter and they grew a deeper colour as they mature, but no, they are either one colour or the other from the beginning).
They grow like weeds in my garden too. Mine are all dark pink, but I seen them growing like this. I've also seen them with pink, yellow and orange flowers on the same plant.
