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'Rock Candy' Purple Penstemon
Penstemon barbatus 'Novapenpin'
A tidy, compact clump of green foliage topped by upright spikes full of deep purple, bell-shaped flowers
Min. USDA Hardiness Zone:
Herbaceous Plant, Perennial
Penstemon barbatus 'Novapenpin' Plant Patent #26701
Western state native:
A tidy, compact clump of green lance-like leaves.
Predominant flower color:
Deep purple, bell-shaped flowers
Fall Color Description:
Winter Interest Description:
Used by Wildlife:
Blooms heavily in late spring, reblooming in late summer if lightly trimmed after the first flush.
Remove spent flowering racemes to prolong bloom. Plants may be cut back to basal foliage after flowering to improve appearance of the planting.
Leave some stems for frost protection and mulch with straw in winter, if necessary.
Long Term Care:
The OSU Plant Clinic has found Phytophthora spp., Rhizoctonia spp., and Fusarium spp. associated with root rots of Penstemon spp. grown in Oregon. (https://pnwhandbooks.org/plantdisease/host-and-disease-descriptions?title=Penstemon-Root+Rot)
Heat and drought tolerant. Penstemon are low maintenance. The main requirement for success is that they need to be planted in well-drained soil-they do not like to have wet feet or crowns. They do best in lean soil without any additional amendments.
OSU Landscape Profile:
LBJ Native Plant Database:
Missouri Botanical Garden Database:
Alternate Source 1:
Alternate Source 2:
George & Vickie Minor
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