Gentiana clusii

Just lovely, a classic….

Large flowers. This belongs to the G. acaulis group. As such they prefer slightly acidic or neutral soil even though they grow over calcerous rock. No lime.  A good re-bloomer and grower. 5-15cm Sunny for good flowers and growth but not dry. They flower on young plants. Sun to light shade.

Heinz Staudacher, CC BY-SA 4.0, via Wikimedia Commons

User:Nino Barbieri, CC BY-SA 2.5, via Wikimedia Commons