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Genus: Gentiana Species: andrewsii Common Name: Bottle Gentian Family: Gentianaceae Order: Gentianales Native: Eastern North America Habit: Herbaceous Perennial Height: 1 to 2 feet Width: 1 to 1.5 feet Flowering Season: Summer to Fall Flower Color: Blue Propagation: Seed, division or stem cutting Zone: 3-7 Note: This plant is suitable for shaded areas of rock gardens, borders, ponds, streams, or woodland and wildflower gardens. Flowers of this species do not open completely, hence the alternative common name "Closed Gentian." Prefers partly shady, moist, well-drained, acidic, organic-rich, sandy soil.