Amsonia tabernaemontana – Eastern Bluestar

General Information: Stunning displays of pale blue flowers adorn this native Milkweed relative from spring to early summer. Depending on climate, flowering can begin as early as March in warm areas, and May in colder climates. The flowers persist for 3-6 weeks before fading, eventually producing a pod-like fruit, known as a follicle, which contains numerous elongated seeds. The flowers may be deadheaded once they are past their prime, as some growers consider the seed pods unsightly and they may cause plants to require staking. For the remainder of the growing season, Eastern Bluestar develops a dense, bushy habit which fills open spaces quite nicely. These plants have a second season of glory in autumn. While the flowers are an incredible and unique sight in the Spring, the brilliant golden fall foliage is equally as stunning. These plants tend to erupt with color as soon as they emerge and again just before going dormant for the year, creating a unique span of appreciation for this species in spring and fall.

Cultivation Details: This species is a clumper. Over time, new growth will form on the circumference of the crown rather than laterally from the roots. As part of the Milkweed/Dogbane family, these plants exude a milky latex when crushed which deters herbivory but also may be mildly irritating to individuals with sensitive skin. Mature plants can be divided at the crown in early spring, as new growth is just beginning to emerge. Consider pairing with other selections from our “Natives” or “Attracts Wildlife” categories. A useful plant for mass plantings, border and fence line plantings, in pollinator gardens, in native plant gardens, for rewilding, in rain gardens, or as a specimen plant. Makes an excellent companion to shrubs.

Growing Requirements: Plant in full sun to part shade. Plants in part shade may not flower as much as those in full sun. Prefers moist, well-drained soils. Tolerates wet and periodically dry soils. Tolerant of most soil types. Uniquely tolerant of compact clay soils. Plants grown in dry sandy conditions may require additional irrigation until they are fully established. Suitable for mildly acidic, neutral, and mildly alkaline soils.

Fun Facts: The genus “Amsonia” was named in honor of Dr. John Amson, an amateur botanist and early mayor of Williamstown, Virginia who tended to George Washington after he fell sick in the late 1750’s. The genus name “tabernaemontana” was given in honor of Jacobus Theodorus Tabernaemontanus, a German Botanist, Physician, and Herbalist who made major contributions to the early study of plants with the publication Neuw Kreuterbuch.