Serrano pepper plant with red and green fruits
The serrano pepper (Capsicum annuum) is a type of chili pepper that originated in the mountainous regions of the Mexican states of Puebla and Hidalgo. The name of the pepper is a reference to the mountains (sierras) of these regions.
Serrano plant 
Mature serrano pepper plants reach a height of between one and a half and five feet tall. Each plant can hold up to fifty pepper pods. Unripe serrano peppers are green, but the color at maturity varies. Common colors are green, red, brown, orange, or yellow.
A typical serrano pepper plant will grow to about a foot and a half. A single plant can yield dozens of peppers and they can be harvested while they are green or red. Serrano peppers prefer to live in soils with a pH between 7.0 and 8.5. Serranos are not frost tolerant and do best in warm temperatures above 75 °F (24 °C).
Serrano fruit 
The Scoville rating of the serrano pepper is 10,000 to 25,000. They are typically eaten raw and have a, bright, and biting, flavor that is notably hotter than the jalapeño pepper. Serrano peppers are also commonly used in making pico de gallo, and salsa, as the chili is particularly fleshy compared to others, making it ideal for such dishes.
See also 
- DeWitt, Dave; Paul W. Boslund (2009). The Complete Chile Pepper Book: A Gardener's Guide to Choosing, Growing, Preserving, and Cooking. Timber Press. p. 64. ISBN 0-88192-920-4.
- "Growing Serrano Peppers". PlantDex. Retrieved 7 June 2012.
- "Types of hot peppers". Retrieved 12 March 2010.
- Nolte, Kurt. "Serrano Peppers". cals.arizona.edu. Retrieved 30 August 2012.