This gentian is the little sister of Gentiana lutea :), growing not as tall but very similar in habit, although the leaves are smaller and the flowers are deep red-wine coloured.
Growing them both together seems like a great idea! Seeds gratefully received from happy plants growing in Norway.
Germination: best if sown outdoors in the fall to experience the natural cold/moist required period over the winter. Alternatively it can be germinated most probably, like G. lutea, with the aid of GA3.