This is a vigorous early maincrop which produces lots of useful looking, all blue, oval tubers. It is much more productive than the other well known all blue variety, Congo. It is not a salad for it has high dry matter and produces excellent deep blue novelty crisps, chips and mash. The red, purple and blue pigments in potatoes are anthocyanins which are antioxidants. They are completely tasteless but have strong anticarcinogen properties. I sometimes wonder if the colour in novelty crisps balances the harm that the frying process does! The Salad Blue flowers are very distinctive. They are strong with white and blue/ purple petals and yellow anthers which turn black, presumably when the unusually dark pollen is released. I am mystified about the origins of this variety. It has not been in the National Collection until recently and is not mentioned by Salaman.