Plant Profile: Indigofera heterantha

Another member of the pea family, indigofera, commonly referred to as Himalayan indigo, is indigenous to the regions of the Himalayas, as well as Afghanistan and Tibet. This plant thrives in various soil types, including clay, and prefers well-drained, neutral to slightly alkaline soils with moderate moisture levels. Once established, it demonstrates resilience to sun, heat, and drought; however, in hot and humid conditions, it benefits from some afternoon shade. During particularly harsh winters, the tips of its branches may be susceptible to damage. Since it blooms on new growth, it is advisable to prune it back to the ground or to healthy growth early in spring or even late winter.

Reaching a height and width of 4 to 6 feet, its leaves exhibit a grey-green to blue-green hue, featuring 4 to 6-inch pinnate leaflets, though it does not display notable fall colors. The flowering period occurs in the summer, showcasing pea-shaped blossoms that range in color from pink to rose to lilac, clustered in dense racemes measuring 3 to 5 inches, which are later followed by dark purple seed pods.