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Desert false indigo
Also known as: Indigo bush, Dullleaf indigo, Desert indigo bush, Lead plant
Desert false indigo (Amorpha fruticosa) is a deciduous shrub that grows from 1.8 to 3 m tall. It is commonly seen growing in thickets along riverbanks and can spread very quickly. It is invasive in some areas. Small purple flowers with yellow stamens extending above the petal bloom from spring to summer.
Scientific classification
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Perennial
Lifespan
Shrub
Plant Type
Spring, Summer
Bloom Time
Spring, Summer, Fall
Harvest Time
1.8 m to 3 m
Plant Height
1.8 m to 4.5 m
Spread
Green
Leaf Color
8 cm to 15 cm
Flower Size
Brown, Copper
Fruit Color
0 - 35 ℃
Ideal Temperature
Spring, Summer
Growth Season

Images of Desert false indigo

Attributes of Desert false indigo

Growth Rate
Desert false indigo's slow growth rate during spring and summer seasons is characterized by a measured display of foliage expansion, where leaf production is gradual, contributing to its rich bluish-green hue. Despite this slow rate, punctuated progression in height can be observed, specifically throughout the summer. Each new growth increment shows a resilient adaptation to arid conditions, underscoring desert false indigo's unique desert survival trait.

Distribution of Desert false indigo

Distribution Map
Amorpha fruticosa, commonly known as 'false indigo,' is a plant species with a widespread presence. Native to North America, particularly the United States, desert false indigo has been introduced across significant parts of Europe and Asia, where it is cultivated for various purposes. Additionally, desert false indigo has established itself in parts of Oceania. While desert false indigo is appreciated for its ornamental value in cultivated landscapes, in certain areas of Europe, it is sometimes thought to exhibit invasive tendencies, potentially leading to ecosystem disruptions. This cultivation and naturalization showcase desert false indigo's broad adaptability to diverse environmental conditions.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
River banks, rich moist thickets
Hemisphere Trend Curve

Weed Control

Desert false indigo is a perennial shrub with characteristic, long inflorescences, often cultivated as an ornamental plant. However, it also displays invasive behavior in some regions of Europe and North America.
How to Control It
The optimal time to manage desert false indigo is in the late winter or early spring, before it begins its growth cycle and goes to seed. Removal or control should occur before it reaches the flowering stage to prevent seed dispersal.
  1. Mechanical removal: Manually pull young shrubs ensuring you get as much of the root system as possible to prevent regrowth.
  2. Mulching: Lay a thick layer of organic mulch around desired plants to suppress desert false indigo seedlings by blocking light and hindering germination.
  3. Mowing: Regularly mow the area where desert false indigo is unwanted to prevent it from maturing and seeding.
  4. Strategic planting: Cultivate competitive plants that overshadow desert false indigo, limiting its light and space to grow.
  5. Barrier installation: Create physical barriers with landscape fabric or plastic sheeting around garden areas to inhibit desert false indigo expansion.
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Quickly Identify Desert false indigo

1
Unique single-petal flowers in deep purple or blue hues, forming elongated racemes.
2
Dull gray-green leaves with 13-33 spiny-tipped elliptic leaflets, turning yellow in fall.
3
Woody lower stems and green upper stems, multi-stemmed and reaching up to 2 feet (60 cm).
4
Kidney-shaped fruit pods with warty texture, green to brownish-purple, containing one or two seeds.
5
Smooth trunk with scattered lenticels, gray to brown bark varying with age and environment.
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RELATED: How to identify Desert false indigo

Care Guide for Desert false indigo

Every 2 weeks
Water
Full sun
Sunlight
0 - 35 ℃
Ideal Temperature
Garden Soil
Soil Type
Water: Desert false indigo is well-suited for arid environments, requiring minimal hydration and exhibiting high drought tolerance. Watering every two weeks is sufficient, reflecting its adaptation to limited rainfall. As an outdoor plant in dry climates, desert false indigo effectively utilizes scarce water resources during growth cycles.
Fertilize: For optimal growth, desert false indigo requires balanced spring fertilization and a high-nitrogen mix pre-flowering. Apply biannually, following product guidelines, and halt in winter to conserve nutrients. Adjust seasonal dosing to align with desert false indigo's growth cycle. Always use gloves and adhere to label instructions for safety.
Pruning: Desert false indigo is a deciduous shrub with tall, arching branches and vibrant purple-blue flowers. Annual pruning after flowering promotes new growth, shapes the plant, and removes dead or crossing branches. This practice enhances air circulation and encourages vigorous blooms in the following year.
Propagation: Desert false indigo is ideally propagated using cuttings and layering in autumn and winter. It has moderate propagation difficulty, with success indicated by new growth. Using rooting hormone can enhance the likelihood of successful propagation.
Repotting: Repot desert false indigo every 2-3 years in spring, using a larger pot for growth. Ensure the new container is wider and maintain moist soil with full sun for optimal recovery. Desert false indigo is resilient but requires space to thrive.
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RELATED: How to Grow and Care for Desert false indigo
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