Gentians are prized for their tubular flowers in intense blue shades. Many are considered difficult to grow, but the following need little more than consistent moisture and humus-rich soil with excellent drainage. Some require lime-free soil, as noted. Well worth extra care, as they produce some of the richest blues in the garden.Gentiana asclepiadea
Native to Europe andwestern Asia. Arching, large-leafed stems form a clump 2–3 ft. high and 1 1/2 ft. wide. In late summer and early fall, rich, deep blue, 1 1/2-in., trumpet-shaped flowers open into stars atop the stems and among theupper leaves. Thrives in rich, neutral to acidic soil; makes a choice companion for ferns.Partial shade.
Grows 2 to 3 ft. tall, 1 to 2 ft. wide, producing flattish sprays of yellow flowers from mid or late s...
Grows 18 to 30 ft. tall and wide. Can handle temperatures in the 0° to 10°F/-18° to -12°
These low-growing plants spread by rooting surface runners. One species is an often-seen small-scale g...