The willow gentian is an excellent perennial, soon forming a clump of upright leafy stems, with a pair of flowers from each leaf axil. The standard form has tubular blue flowers, but we also offer some variations on the theme. The colour forms usually come true from seed.

Gentiana asclepiadea 'Nana' is a compact version of the willow gentian, as usual with flared tubular blue flowers lining the upright stems.