I've grown moruga scorpions, the bhut jolokias I mentioned, and 7 pots, as far as superhots go. Congo red habaneros, orange habs, and assorted weaker hots. The superhots always grow slowly, habs a bit less so. I started all of them in February last year, and the Hungarian hots had peppers on them already when they went outside. They were too big to put cages around without breaking branches so I just went with stakes. The prettiest ones were the explosive ember and black pearl varieties. The foliage was a purple so dark it looked black, even the cotyledons. The flowers were purple too, and the peppers started purple and then turned black, then to dark red. Not a lot of heat, about equal to cayenne, but tasty.