Yellow sweet clover (Melilotus officinalis) is the primary nectar source of our Western Clover Honey. Sweet clover is a common sight in ditches and fields throughout Minnesota and across the upper Midwest. This tall, distinctive plant is a favorite of honey bees and cattle, if not of ecologists. Sweet clover is considered an invasive species because of its ability to spread throughout prairies and disrupt the native species that live there.