Extra Hot Chilli Seeds. In this category you will find chilli seeds for extra hot chillies. Generally speaking, these are chillies ranging from 600,000 SHU to 1,000,000 SHU. That is some 120 to 200 times hotter than a Jalapeno. These chillies are insanely hot chillies and even though they are not the world's hottest, they are probably hotter than anything you have ever experienced before.