The spectacular rich blue colored flowers reaching up to 1.5 inches in length and occurring clustered at the top of the plant within the leaf axils make great pops of color interest in the late summer-to-fall garden.
This member of the Gentianaceae is native to North America from the Dakotas to the east coast, including Indiana. Plants can grow up to 2 feet in height and reach 1.5-2 feet width with a sprawling habit. This growth habit makes the bottle gentian perfect for naturalizing in your garden. You will get the most from bottle gentian when plants are grown in moist, rich, slightly acidic soils; however, the species is adaptable to most organic-rich garden soils.
Viewing bottle gentian in the garden, many people assume the bottle-shaped flowers will open soon to display a full flower. However, bottle gentian flowers never fully open and remain closed or mostly closed. The flowers are highly attractive to honeybees and native bees, the latter of which are strong enough to open and enter the partially-closed flowers of this gentian where an ample nectar reward awaits.
Sun Exposure - Full, Partial
Soil Moisture - Medium-Wet, Medium
Height - 2 feet
Bloom Time - August, September, October
Bloom Color -Blue