Mary Milton Pink Flowering Japanese Snowball Viburnum. We have found that this cultivar is more consistent at flowering pink than 'Kern's Pink.' It has 2-3" rounded heads which flower a consistent soft pink. My guess is that the further north one grows this selection, the "pinker" it will be. After mild winters here, the flowers will border on white, but after colder winters, we notice much deeper hues. Grown in full sun, this plant will reach 8-10.' To see this selection in its full glory is a spiritual experience.