Propagation is by division, seeds or cuttings. Plants should be kept in pots until thoroughly established. The species are biennial or perennial except in group Aaa below. Many of them are densely cespitóse. | Propagation is by division, seeds or cuttings. Plants should be kept in pots until thoroughly established. The species are biennial or perennial except in group Aaa below. Many of them are densely cespitóse. |