?80 Days from transplant. Serrano is a hot, sweet pepper with a great taste! This pepper variety is a pungent pepper that can grow up to 4" long! These skinny peppers have medium thin walls that mature to a bright red color on thirty inch tall plants. This pepper is a favorite in salsas, sauces, and Mexican dishes. 10,000 Scoville heat units. A little hotter than Jalapenos. Serrano chiles are a traditional favorite in Mexico. They get their name from a Spanish word that means "From the Mountains". From salads to sandwiches to salsas, serrano peppers are a versatile ingredient that delivers both heat and color to any dish. Serrano peppers can also be pickled, which tames their heat and gives them a longer shelf life. Try adding serrano peppers to your homemade jellies for unexpected punch. The green ground form of serranos is unique to chile peppers, which are often dried and aged before they are ground into powder. This powder is often used as a finishing spice.?