Dorset Naga is one of the strongest chili with a ca 661,000 SHU (Scoville Heat Units) for green immature fruit and ca. 1,032,000 SHU for ripe fruit. I have bought the plants of Joy and Michael Michaud at Sea Spring Seeds in Dorset, England.
The plant can be about 1,5 metres high but in a pot it becomes less. My plants are not so big yet but they put many fruits. These plants should I Hibernate so next chili years so they will grow up in 20 liter pots and hopefully get really big.
A short film about chili Dorset Naga of Sea Spring Plants.