Overview
Amsonia hubrichtii is a clump forming herbaceous perennial in the genus Amsonia, part of the Apocynaceae family, with deciduous foliage. It typically grows around 0.5-1 metres tall and 0.1-0.5 metres wide, reaching full size in around 2-5 years. Amsonia hubrichtii grows best in full sun and partial shade, and tolerates most soils and any pH. Its UK hardiness is rated H7. It is drought resistant. Suggested uses include cottage and informal garden and prairie planting. It is native to USA (Arkansas and Oklahoma).
About
This perennial grows in clumps and features upright stems adorned with slender, needle-like foliage. In spring and summer, the leaves are a vibrant green, transforming to a rich golden yellow in the fall. During early to mid-summer, the plant produces terminal clusters of dark blue buds that unfurl into light, greyish-blue, star-shaped blooms.
About the genus
Amsonia consists of perennial plants that grow in clumps and produce a milky sap. They feature elongated, lanceolate leaves and bear clusters of small, star-like blue blooms at the tips during the spring and summer months.
Growing conditions
Best soil and position for Amsonia
- Sunlight
- Full sun, Partial shade
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- West-facing, South-facing, East-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
Amsonia hubrichtii size, habit and characteristics
- Plant type
- Herbaceous Perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- Cottage and informal garden, Prairie planting
- Native to
- USA (Arkansas, Oklahoma)
Care notes
Pruning and caring for Amsonia hubrichtii
- Cultivation
- Grows best in a fertile, moist but well-drained soil in full sun, although it can tolerate partial shade and is fairly drought-tolerant
- Pruning
- Cut back in late autumn
- Propagation
- Propagate by seed sown in pots in a cold frame in autumn or spring. Alternatively propagate by division in spring or root softwood cuttings in early summer
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free
Frequently asked questions
How do I grow Amsonia hubrichtii?
Grows best in a fertile, moist but well-drained soil in full sun, although it can tolerate partial shade and is fairly drought-tolerant.
Where is the best place to plant Amsonia hubrichtii?
Amsonia hubrichtii prefers full sun and partial shade. It suits exposed and sheltered positions.
What soil does Amsonia hubrichtii need?
Amsonia hubrichtii is adaptable and grows happily in most soil types, including chalk, clay, loam and sand. It is happy in soil of any pH. Aim for soil that stays moist but well-drained.
How do I prune Amsonia hubrichtii?
Cut back in late autumn.
How big does Amsonia hubrichtii grow?
Amsonia hubrichtii reaches a height of 0.5-1 metres and a spread of 0.1-0.5 metres. It takes around 2-5 years to reach full size.
Is Amsonia hubrichtii hardy in the UK?
Amsonia hubrichtii has a UK hardiness rating of H7.
How do I propagate Amsonia hubrichtii?
Propagate by seed sown in pots in a cold frame in autumn or spring. Alternatively propagate by division in spring or root softwood cuttings in early summer.