I can only say for sure that they grow well in northwestern Florida.Boy Rocky, I just looked up cow horn peppers and they sound about ideal for a guy like me who likes a little heat but has to draw the line at a judicious use of habanero salsas.
What do cow horns require as far as climate to grow them?
I would think that they would grow any where in the US in the summer.
I have a jalapeño and a Serrano that I have had for 3 seasons that I keep indoors over the winter. They have cross pollinated so that now they produce the same fruit on each plant.
I have over-wintered my Thai pepper plant as well.
I grow these plant on my back porch/ patio.