Crambe cordifolia Colewort Z. 5-9
Giant profusion of white flowers from late May to June
Size: 7-8’ x 5’ Care: full sun in well-drained soil Native: Caucasus
First collected before 1863. ”This is a stately and noble plant, with large heart shaped leaves. The loose flower-heads, which are often 6 feet in height, and nearly as much through, are composed of myriads of small white flowers, which at a distance may be likened to a giant specimen of Gypsophila; it blooms during June and July.” H.H. Thomas 1915.
Penstemon hirsutus Downy penstemon Z. 3-9
Lavender-Pink outside and white inside funnels in June
Amsonia hubrichtii Thread leaf amsonia Z 5-8
An erect, clump-forming plant that is primarily grown for its blue spring flowers, feathery green summer foliage and golden fall color. Powdery blue, 1/2″ star-like flowers appear in late spring atop stems rising to 3′ tall.
Size: 2-3’ x 2-3’ Care: full sun to part shade in well-drained soil Native: Ouachita Mountains in central Arkansas.
First recorded in the 1770s as A. angustifolia, but later named Hubricht’s Amsonia, after Leslie Hubricht, an American biologist who re-discovered it in the 1940s.
Platycodon grandiflorus albus Balloon flower Z 4-9
Platycodon grandiflorus var. albus – Balloon flower Z 4-9
Balloon shaped buds opening to white bells in mid to late summer
Size: 24" x 12" Care: Full sun to part shade in moist well-drained to well-drained soil. Native: Eastern Asia Awards: England's Royal Horticultural Society Award of Garden Merit.
Platycodon is Greek from platys meaning “broad” and kodon meaning “bell”, referring to the shape of the flower. Planthunter Robert Fortune found the white form in a nursery near Shanghai and sent it to England in 1845.