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10 Μαρ 2023 · Technically, “indigo plants” could refer to any of the 750-plus species of trees, shrubs, herbaceous perennials, or annuals within the Indigofera genus. Here, we’ll cover a handful of popular species that can be grown in the US: I. amblyantha, I. decora, I. heterantha, and I. kirilowii.
Genus: Indigofera. Species: heterantha. Skill Level: Experienced. Exposure: Full sun. Hardiness: Hardy. Soil type: Well-drained/light. Height: 180cm. Spread: 180cm. Time to plant seeds:...
Himalayan indigo. A medium-sized deciduous shrub, herbaceous in colder areas and then making up to 1.2m annual growth. Leaves pinnate with 13-21 small leaflets. Flowers 12mm, rosy-purple, in racemes to 12cm in length from early summer.
Bot. Mag., t. 5063. Native of China and Japan; introduced about 1845 by Fortune, who found it growing in the gardens of Shanghai. It is a charming dwarf shrub, flowering freely in July and August, its shoots being mostly cut back to the ground in winter.
Indigofera heterantha. Wall, ex Brandis (1874) Indigofera heterantha flowering on the south-facing terrace at Knightshayes Court, Devon, UK (September 2022). Image Jack Aldridge. A deciduous shrub with downy, slightly-ribbed branches.
Grow Indigoferain a shrub border or train it against a warm, sunny wall. Indigofera is a genus of more than 700 species of evergreen or deciduous shrubs, perennials, and annuals. Indigofera is found in mostly tropical and subtropical regions around the world.
Native of Yunnan, China; discovered by Delavay in 1887; introduced by Forrest in 1914. This species is remarkable for the great length and slenderness of its racemes which develop successively along the shoots.
