Ok so genetics aside, what environmental effects influence the heat of a Pepper? I have about 9-10 different peppers growing and like em Hot! I just grew 3 different types of radish and all 3 of them were incredibly spicy! I mean this was the hottest Radish I've ever had. What accounts for this extra-heat? Is it the hot, dry, arid climate of the Sonoran Desert? or the soil? I'm just curious to what i contribute my extra spicy garden too?