Sand-Dune Penstemon, Sharpleaf penstemon
Penstemon acuminatus
Family: Scrophulariaceae
What it is like
Penstemon acuminatus is a PERENNIAL growing to 0.6 m (2ft) by 0.3 m (1ft in). See above for USDA hardiness. It is hardy to UK zone 5. It is in flower from July to September. The species is hermaphrodite (has both male and female organs). Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil. The plant can tolerate maritime exposure.
Height (m): 0.6
Where it is found
Dry, open, commonly sandy places at low elevations, often on dunes.
Western N. America - Washington and Oregon to Idaho.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 0
Medicine
Rating: 1
The leaves are antiemetic and stomachic. An infusion of the leaves is used to stop vomiting. A decoction is used in the treatment of cramps and stomach pains.
Antiemetic: Prevents vomiting.
Stomachic: Aids and improves the action of the stomach.
Other
Rating:
How it is grown
Succeeds in ordinary rich garden soils so long as they are well-drained. Succeeds in dry soils. Requires a position in full sun. Many members of this genus are very cold hardy, but do not prosper in Britain because they dislike winter wet. This species is more tolerant of British conditions than many other members of the genus. Judging by its native habitat, it is likely to succeed in maritime exposure.
Propagating it: Seed - sow late winter in a greenhouse. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in late spring. Alternatively, the seed can be sown in early summer in a greenhouse, the seedlings overwintered in the greenhouse and then planted out in the following spring. Division in autumn. Cuttings can be taken throughout the growing season, though August/September is best.
Best place to grow: Cultivated Beds;
Habit: Perennial
Hardiness: 4-8
Growth:
Soil: Light (sandy), medium, heavy (clay)
Shade: No shade
Moisture: Dry, moist