Gentiana purpurea aka Purple Gentian

Gentiana purpurea is a perennial in the gentian family, Gentianaceae. Its English name is purple-flowered gentian. It comes from central and northern Europe. Its range includes Norway, Austria, Switzerland, Germany, Italy, and France. It is not native to Britain or Ireland. In the wild, it grows in meadows and pastures. It also grows in grassy hollows in the mountains. Some plants grow among scrub or in sparse conifer woods.

This species reaches about 2 feet [0.6 metres] tall. It flowers from July to August. Each flower has both male and female organs. Bumblebees and butterflies pollinate the flowers. Its summer bloom offers interest in planted beds. A sunny woodland edge is another listed garden setting. These sites reflect its mix of open and lightly wooded habitats. The supplied sources give no species-level details on its fruit or leaves.

Choose moist soil that drains well for this plant. It accepts sandy, loamy, and clay soils. Its preferred soil ranges from mildly acid to neutral. In nature, it grows mostly on soils without lime. The cultivation notes favour sandy soil with added organic matter. The soil must be deep enough for its roots. Full sun suits it when moisture remains available below ground. It also accepts light shade. Keep the soil moist through summer rather than choosing a dry site. Plants For A Future lists USDA hardiness zones 4–8.

Seed offers one way to raise new plants. Sow fresh seed when ripe in a bright cold frame. Late winter and early spring are other sowing times. A cold spell helps the seed germinate. The source suggests a few days near 10°C first. This lets the seed take up water before chilling. Follow with five to six weeks between 0°C and −5°C. Stored seed soon loses its ability to sprout. Older seed may sprout slowly and at uneven times.

The root sometimes goes into the making of gentian bitters. Plants For A Future gives its food use a low rating. It also lists this species as a source of medicinal gentian root. That does not make its root a general food crop. The source reports no known hazards, but supplies no detailed safety assessment. It lists no other uses and does not flag weed potential.