Where can you grow saffron crocus?
What climate does saffron grow best?
Saffron crocus thrives at 70°F but grows in a wide range of temperatures from 50°F to 90°F. They tolerate lower temperatures for short periods. They are not cold hardy in USDA Zones 3-4, so dig the corms or move plants in a container to a warmer sheltered area after they bloom in fall in those zones.