Easily grown in average, medium, well-drained soil in full sun to part shade. Prefers moist, loamy soils. Good drought tolerance. When grown in too much shade, plants tend to become more open and floppy. Although cutting back most Amsonias to 6-8" after bloom is recommended in order to help maintain neatness and increase foliage density, such trimming is usually not needed in the case of this compact plant.
Amsonia tabernaemontana, commonly called bluestar, is a Missouri native herbaceous perennial which occurs most frequently in rich, open woods and thickets in the southwestern part of the State. An erect, clump-forming plant which features terminal, pyramidal clusters of 3/4", soft light blue, star-like flowers in late spring atop erect, leafy stems growing 2-3' tall. Narrow, willow-shaped, dull green foliage may turn an attractive yellow in fall.
Specific epithet honours Jakob Theodor von Bergzabern (d. 1590) who Latinized his name as Tabernaemontanus.
'Montana' differs from the species in that the flowers are a deeper blue, the leaves are slightly wider, the habit is more compact and the flowers bloom 1-2 weeks earlier. Willow-shaped, green to grayish-green foliage may turn an attractive yellow in fall. This plant is sold under several names: Amsonia tabernaemontana 'Montana', Amsonia tabernaemontana var. montana or Amsonia montana.
No serious insect or disease problems.
Borders or rock gardens. Best when massed.