Honesty; is an old-fashioned dual purpose biennial, grown partly for its fragrant bright flowers in spring and early summer,and its unique seedheads.
These oval translucent seed pods are coveted by flower arrangers.
It can grow into a large, well-branched plant 750mm-900mm (30"-36") high and spreads to around 300mm (12") in its second year, after which it will seed itself freely around the garden.
Cut down stems when seed heads appear.