Chilli Pepper

My daughter Natalie has got quite keen on growing chilli peppers and this Spring she gave me four plants in pots (all different varieties) They are growing on in the conservatory and this one is doing the best It's called 'Mirasol' but when it has been and harvested and dried it has another name for some reason: 'Guajillo' It is described as 'medium' in the range of heat associated with chillies