Gentiana
General Description:
Upright, herbaceous perennial with bluish-green leafy stems and lance shaped to ovate leaves. Terminal and axillary clusters of tubular-bell shaped blue flowers open in late summer. Plant in alpine gardens, rock gardens and woodlands. Sensitive to over-watering, therefore, must have good drainage.
Cultivation:
Plant in light, humus rich, moist but well drained soil. Can withstand full sun locations where summers are cool and damp, elsewhere, plant in part shade locations.
Propagation:
Sow seeds as soon as the seeds are ripe. Seeds require light to germinate and should be sown as fresh as possible due to a short viability period. Fresh seed does not require chilling, however older seed does. Divide roots or root offsets in early spring.
Pests & Disease:
Rust and Asteromella / Cercospora leaf spot are common. Slugs, snails, aphids and spidermites may cause damage.