The Serrano Pepper originated in the mountainous (Sierras) regions of the Mexican states of Puebla and Hidalgo. Mature Serrano Pepper plants reach a height of 1 ½ - 5 feet tall. The fruit can be harvested while they are green or ripe. Unripe serrano peppers are green, but the color at maturity varies. Common colors are green, red, brown, orange, or yellow. They are typically eaten raw and have a bright and biting flavor that is notably hotter than the Jalapeño Pepper. Serrano Peppers are commonly used in making pico de gallo, and salsa, as the chili is particularly fleshy compared to others, making it ideal for such dishes.
The chile "heat" of the Serrano Pepper typically ranges from 10,000 to 25,000 on the Scoville scale.