The jalapeno is a medium to large size chili pepper which is prized for its warm, burning sensation when eaten. Ripe, the jalapeno can be 23 1/2 inches (59 cm) long & is commonly sold when still green. Jalapenos are a pod type of Capsicum. The growing period for a jalapeno plant is 70-80 days. when mature, the plant stands two & a half to three feet tall. As the growing season comes to an end, the jalapenos start to turn red. The Jalapeno rates between 2,500 & 10,000 Scoville units in heat. In comparison with other chili peppers, the jalapeno has a heat level that varies from mild to hot depending on cultivation and preparation. The heat, which is caused by capsaicin and related compounds, is concentrated in the veins .