Green poinsettia in Cyprus

Nearly a year ago, Richard brought a poinsettia home from the office. If you click that link, you'll see a picture of it with large, dark green leaves, and the typical scarlet bracts at the top. It was also sprayed with glitter, so I didn't expect it to survive.

Two months later, the poinsettia was still alive. Looking a little wilted around the edges, but there was some new green growth, to my surprise.

It evidently liked that table by the window, where we put it, so it's remained there all year. This is what it looks like now:



Very green. Much smaller leaves, and all green. There are lots of new small leaves, so I suppose likes the cooler, dryer weather. But I'd hoped it might have started going red again around the top. Was that too much to hope for? Do poinsettias only have one display of scarlet in their lifetime? Does anyone know?