There are many different varieties of chilli out there. There are some chilli which are very mild, while others are extremely hot. I have some Bird’s eye chilli plants growing in my conservatory for the last 2 years. These are reasonably hot, but I wanted to grow some extremely hot chilli as well. Hence I bought the Bhut Jolokia (Ghost pepper) plant, which was at one point in time the hottest chilli in the world (in 2007).
Here are some images of the Bhut Jolokia.
These chilli do take quite a long time to ripen, but they are well worth the wait. Definitely hotter than most chilli available out there. This should add further spice to hot dishes, and take them to a whole new level of spicy heat.