two years or more out of flask
We believe there are roughly three types of C. flavum, the type, pale yellow with sometimes red sepals, the alba with a very nice scent and the yellow being very tall plants with vivid yellow flowers without dark labellum and with nice scent also. Both the alba and yellow form need a slightly longer growing season.
The yellow type is the rarest in collections and appeared to be a very good breeding parent. The best clone that is offered is this famous " Yellow Ball " , selfings of .