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.
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.
Grows to 4 ft. tall and 2 1/2 ft. wide. Leaves have five to nine 8-in. leaflets. Red flowers.
From central Europe. Grows to 1 1/2–3 ft. high and as wide. Deep purplish red flower heads bloom...
Native to Chile. This is a slow-growing, single-stemmed palm that grows to 50–60 ft. tall and 25...