Manto,
Mine turned from green to red when they were about three inches long, so you probably haven't got that long to wait. But I notice the bought ones for Mex. foods that are pickled in a jar are always green so maybe if they don't ripen, which I'm sure they will, you can harvest them green.
The habs are so very hot. They are dangerous. But the smell is wild and the taste is great. So thanks Cat for the heads-up on some other milder but flavourful types to grow. I think one needs a big mix of peppers as they do tomatoes
At least that's my argument