Usually adapted to colder weather you can plant them in all areas. They usually are very early bloomers, after snow is melted. Leaves are grass like and appear with. after or before the flower. There are species that bloom in August to October. Usually 3 to 6 inches tall and come in white, yellow, and shades of purple or pink. Saffron used in cooking comes from crocus flowers. Crocus Sativus which blooms in autumn has purple flowers. Crocus Vernus or as known Dutch Crocus comes in various shades and blooms in February to April and is probably one of the most popular varieties grown in gardens or pots.