Dutch Crocus grow best in cool to temperate climates where they look best in rockeries, beds and pots. Choose a sunny spot with well drained soil. They will tolerate light shade, such as under deciduous trees, especially in more Temperate zones. The bulbs of Dutch Crocus don't need to be lifted every year, if they are protected from the hot summer sun and have good drainage, so you can allow them to naturalise and only dig and divide after four or five years.