The Thurber's penstemon (Penstemon thurberi)is a perennial shrub/subshrub.
|Scientific classifications [Edit]|
|Specific epithet ?||thurberi|
|Thurber's penstemon (United States)|
References  ?
Plant added by plantdatabase
If you are planting Clematis on a trellis, why not plant 2 different cultivars. These can be cultivars which flower at the same time to contrast colour or form, or they can be an early and late cultivar to extend your season.
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