So yes, chilis get hotter as they ripen (that is, as they turn from green to red). Many chili varieties are picked and sold in stores while still unripe and green (e.g. jalapeño, serrano, poblano), but you will occasionally see ripe, red ones in stores.
Also, how do you know if a serrano pepper is bad? Serrano peppers that are spoiling will typically become soft and discolored; discard any serrano peppers that have an off smell or appearance.
In this regard, do serrano peppers turn red?
When to Pick Serrano Peppers Eventually the serrano pods stop growing and will then change color, from green to red, brown, orange or yellow.
How do you ripen serrano peppers?
Simply leave your peppers on a sunny windowsill in a warm room for a few days. They will begin to turn color and ripen in the sun. Once ripened to your liking, store them in the refrigerator or use them right away. If they start to go soft, throw them out.
