Purple splotching on green/yellow fruit
I've been watching my Hungarian Wax and Fish peppers develop purple splotching on the fruit for several weeks now. Some people say this is caused by sun burn, but the fact is, it's rather cloudy at least half the time around here for weeks now. The fruit seem healthy and firm, no rotting etc. to speak of, but they seem to be taking waaay too long to ripen.
The plants are outside in pots with drainage, I give them a weak liquid fertilizer (miracle grow diluted to 1/4) once every week or so. Could this issue be caused by cool temps or some kind of deficiency?
Thanks for the advice!