These charming easy to grow and absolutely amazing flower display have all made this one of the most widely collected cacti genus. Most of these cacti come from the mountainous regions of Central South America. All are small growing and many flower at a very young age, sometime in their second year. Flower color can come in reds, yellows, pinks, and many more colors. Many species flower with such perfusion that it is hard to believe a plant that small can have that many flowers. Many species prefer light shade making them ideal for window sill cultivation.