Also known as the Ghost Pepper, this is one of the hottest peppers in the world, bearing extremely hot, red fruit about 2½ inches long. In 2007, Guiness World Book of Records named it the hottest pepper and listed it as 1,002,304 Scoville units. It has since been surpassed, but it’s still plenty hot and should be handled with great care. Germination may take up to one month. 100 days.