How are Crocus measured?
Crocus are measured by the circumference of the bulb. The greater the circumference of the bulb, the more food is stored by the plant to give it a better start and greater success.
A larger bulb will produce a fuller plant with more flowers, giving you a more beautiful garden. For example, a 8/9cm Crocus will produce 2-3 stems per bulb versus a 7/8cm Crocus.