why were my romano sweet peppers fiery hot

were they seed for this pepper or were they seeds you collected from a sweet pepper. If they are you own collected ones then the seed has some of the hot genes. if they were seed bought as romano seeds then i suspect they were mis labbeled by the seed company.
welcome to GoY Bren

No they were bought from a reputable seed catalogue. I wondered if they didn't get enough water whether this would make them become hot. And they really were hot! They looked exactly like the picture in the catalogue but I guess perhaps they were just mis labelled. Thank you for such a speedy response Bren

watering shouldnt make a difference to the heat. i suspect they were mis labbeled then. i gree some largeish very hot ones for hubby a few years ago. and they were evil things. havent grown them since.