Hey, There is a lot of speculation on what that is. Then there are soil conditions, weather, gene pool, fertilizers, and even more factors. So what's the answer? Some part of that is purely subjective...like the Scoville Test. Check out our thoughts at http://www.pepperjoe.com/heatscale.html ...and THANKS to the many chileheads who dropped by to take the "Chilehead Trivia Test". Pepper Joe -------------------------------------------------------- PEPPER JOES 100% organic hot pepper seeds. "home of/FREE pepper-postcards" http://www.pepperjoe.com