Grow Heirloom peppers - Plant Cayenne Long Thin Pepper Seeds - 30,000-50,000 Scovilles Be forewarned: this pepper will make you beg for a tall glass of water! The Cayenne Long Red Thin Pepper is a very hot pepper that can be used in sauces or dried and ground into a spice. Excellent in all sorts of meat and poultry dishes. Not for the squeamish or the bland. Known to be pre-Columbian in origin.