Jalapeno peppers are edible and flavorful at all stages of their growth. However, a connoisseur of jalapeno peppers can distinguish a definite flavor difference between a fully mature jalapeno and one harvested early. A fully mature jalapeno pepper, regardless of size, generally exhibits small cracks around the shoulders of the fruit. Often a darkened area on the fruit indicates maturity and the initial stages of a color change in the fruit.
