|| Capiscum is a genus of flowering plants in the nightshade family Solanaceae that produces peppers. The Capiscum genus contains 20-27 species of peppers which vary in color, shape, size, and heat. 5 species are domesticated. Most peppers are green when unripe and change color as the fruit matures. The fruit of most species contains capsaicin, which gives hot peppers their spiciness. Bell peppers (Capsicum annuum) are an exception: they do not contain capsaicin due to a recessive gene, and are therefore not spicy. The Scoville scale is used to measure the relative heat of peppers. Bell peppers have a rating of 0-25 Scoville Heat Units (SHU), jalapenos are between 2,500-10,000 SHU. All peppers, regardless of species, prefer a long, warm growing season and well-drained soil high in organic matter. Seeds can be started indoors 8-10 weeks before hardening off and transplanting. In cooler climates, it can be preferable to grow peppers in containers indoors to extend the growing season and prevent frost from killing plants. Peppers have an upright growing habit and can benefit from staking to help the plant support the fruits.