Serrano pepper plants (Capsicum annuum) are prolific, bushy annuals (30–48 inches tall) that thrive in full sun and warm conditions, producing 50+ slender, 2–4 inch long, thin-walled peppers per plant. They thrive in hot, humid climates and yield peppers that turn from dark green to bright red,  offering a bright, crisp, and medium-hot flavor (10,000– 25,000 SHU) that is roughly 5 times hotter than a jalapeño