Gentians are prized for their tubular flowers in intense blue shades. Many are considered difficult to grow, but G. asclepiadea needs little more than consistent moisture and humus-rich soil with excellent drainage. Some require lime-free soil, as noted. Well worth the extra care, as they produce some of the richest blues in the garden.Gentiana asclepiadea
Native to Europe and western Asia. Arching, large-leafed stems form a clump 2–3 ft. tall 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 the upper leaves. Thrives in rich, neutral to acidic soil; makes a choice companion for ferns. Partial shade.
In spring, unbranched stems ranging from 6 in. to 3 ft. high are topped by bell-shaped, nodding flower...
Pyramidal tree to 80 ft. tall, 25 ft. wide at the base. Is similar but coarser textured than Chama...
Usually grows to no larger than 10 ft. tall and wide; may need staking to maintain upright growth. Spl...