70-80 days. Serrano Tampiqueño Hot Pepper Seeds. Capsicum annuum. Open Pollinated. Non-GMO. The pride of Guanajuato, Mexico, the Serrano Tampiqueño is one of the most diverse pepper plants available. Similar in appearance to the popular jalapeño, Serrano Tampiqueño seeds grow compact 2" long peppers without comprising heat. Registering at broad 10,000-25,000 SHU, the Serrano Tampiqueño is most popularly enjoyed raw, grilled, or pickled.