Peppers
Capsicum annuum from the Solanaceae (nightshade) family. Related to the potato, eggplant, tomato, tobacco plant, deadly nightshade, tamarillo, et al. Native to South and Central America. Known as a capsicum here in Australia and other parts.
I've grown two types of pepper, one a dismal failure, the other a reasonable success. The first attempt was the bell pepper, the capsicum as us Australians better know it as. I had two varieties, one grew a bright yellow fruit, the other a deep purple fruit.
Alas, mildew got to them and I managed to get one edible fruit off both of them before I pulled them up.
The second type I've grown is the elongated hot pepper kind. I've had far more success with this one and it seems to be free of the dramas that bedevilled my other two. Naturally, the fruit of this one is a little hotter, meaning my kids won't eat them.
I've had more success in keeping mildew and other spot-type diseases off the peppers this time around by giving them a good weekly spray of Mancozeb. It's worked wonders for the peas, beans and tomatoes I have growing as well.
They have the same growing requirements eggplants and tomatoes do, and they aren't really for cooler temperate areas unless you have a greenhouse.