Platycodon grandiflorus ‘Astra Pink’ – A compact Balloon Flower which does not require staking, it bears large light pink (appear near white in full sun) five-petaled flowers with rose veining from June to August. Platycodon prefers part to full sun with well-drained soils and these herbaceous perennials are often slow to break dormancy. Grows 8-12″ high by 6-8″ wide. Zone 3.
Platycodon grandiflorus ‘Sentimental Blue’ – One of the more common varieties of Balloon Flower with bright 3″ wide violet-blue flowers (with darker veining) borne throughout the summer. They get their common name from the inflated flower buds (which really impress kids) that pop open to star-shaped blooms. Grows 6 to 12″ high by 12 to 18″ wide. Zone 3.
Platycodon grandiflorus ‘Astra White’ – A compact form (about 1/3 the size of taller Balloon Flowers) with pure white star-shaped flowers from June to August (a semi-double form is also available). Division of Platycodon is not recommended as the fragile root system (tap-rooted) is easily damaged. Deer resistant. Grows 8 to 10″ high by 12 to 16″ wide. Hardy to zone 3.
Platycodon grandiflorus ‘Balou Blue’ – This dwarf variety was bred and introduced by Kieft Seeds of Holland. It features deep periwinkle blue flowers (with dark purple veining) throughout the summer, nicely contrasted by the matte green foliage below. While not absolutely necessary, deadheading spent blooms will improve flower production. Grows 8-10″ high and wide. Zone 3.
Platycodon grandiflorus ‘Fuji Pink’ – An older standard variety which is a reliable bloomer, bearing soft pink star-shaped flowers (with darker veining) from June to August. These will fade to near white if grown in full sun. ‘Fuji Pink’ is a taller form making it an excellent choice for cut flowers. Platycodon is generally pest and disease free. Grows 16-24″ high by 12-18″ wide. Zone 3.