Gentiana scabra or Border Gentian is a low growing, rhizomatous perennial that prefers cooler climates and is quite frost hardy.
It is an easy to grow plant for borders or pots and planters that produces a dense mat of soft green foliage with intensely blue, open funnel-shaped flowers held aloft.
They make a powerful display when planted en-masse and in drifts, with blue being a very much 'In-Vogue' colour these days.
Gentiana are a useful plant in that they will be happy in a mixture of light from shade, through dapple light to full sun - though some of each during the day is best. This means you can grow them successfully in those borders that go into shade for part of the day - which is not a common trait in border plants.
They are good for cut flowers and attract birds, bees and butterflies to your garden.