Himalayan Indigo

Indigofera heterantha

$23.00 Sold out

1 Gallon | Hardiness Zones 6-9

This medium to large shrub bears rosy purple flowers in 5 inch long racemes produced from axils of the compound leaves summer through fall. The leaves are made up of many small leaflets along a midrib. Dr. Michael Dirr in his Manual of Woody Landscape Plants says: "This species has performed admirably in our Georgia tests." Plant is sun or semi-shade in well-drained soil.

Pickup currently unavailable at Aiken Nursery

PLANT DETAILS

Hardiness Zones: 6 - 9

Soil: Well-drained

Sun: Full Sun and Part Shade

Seasonal Behavior: Evergreen

Growth Rate: Moderate

Height at Maturity: 4 - 6 Feet

Spread at Maturity: 4 - 6 Feet

Foliage: The leaves are pinnate with small, dark green leaflets, providing a soft, feathery texture.

Flowers: Produces long racemes of small, pea-like pink to purple flowers from late spring to early summer. The blooms are attractive to pollinators and add a splash of color to the garden.

Rosy purple flowers

Light Requirements: Prefers full sun to partial shade. Indigofera heterantha thrives in full sunlight, which encourages the best flowering and overall plant health. It can tolerate partial shade, particularly in hotter climates, but full sun is ideal to ensure abundant blooming.

Soil Requirements: Prefers well-draining, moderately fertile soil. This plant grows best in loamy or sandy soils with a slightly acidic to neutral pH range (6.0-7.5). While it can adapt to a variety of soil types, it is essential that the soil drains well to prevent root rot. Adding organic matter, such as compost, can help improve soil structure and support robust growth.

Watering: Requires regular watering, especially during dry periods. While Himalayan Indigo is relatively drought-tolerant once established, it benefits from consistent moisture during the growing season. Water deeply and regularly, but avoid waterlogged conditions. Mulching around the base of the plant helps retain soil moisture and keep the roots cool.

Temperature and Humidity: Hardy in USDA zones 6-9. Indigofera heterantha is well-suited to temperate climates and can tolerate cold winters, making it a good choice for a variety of regions. It is generally low-maintenance regarding humidity, thriving in typical garden conditions.

Fertilization: Apply a balanced, slow-release fertilizer in early spring to support healthy growth and abundant flowering. An additional application of fertilizer in mid-summer can help sustain the plant during its peak growing season. Organic fertilizers, such as compost or well-rotted manure, are also beneficial for maintaining soil fertility and encouraging lush growth.

Pruning: Prune lightly in late winter or early spring to maintain the plant’s shape and remove any dead or damaged branches. Regular pruning helps encourage bushier growth and more prolific flowering. After the flowering season, light pruning can also be done to tidy up the plant and encourage a second bloom in some climates.

Pests and Problems: Generally pest-resistant and disease-free. Indigofera heterantha is a hardy plant with few common pest or disease issues. However, it’s always good to monitor for any signs of fungal infections, especially in overly wet conditions. If pests or diseases are detected, treat with appropriate measures such as insecticidal soap or fungicides.

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