Blue bean tree (Decaisnea insignis)

Blue bean tree

The Decaisnea insignis grows as a deciduous shrub that can reach heights of about 5 m. The branches are strong but brittle, filled with marrow and have yellow bark. The lenticels are circular or elliptical in shape. The winter buds are ovate with a pointed tip and have warty outer scales.

Scientific classification

Species

Blue bean tree (Decaisnea insignis)

Buttercups, poppies and allies

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Perennial

Lifespan

Shrub

Plant Type

Summer

Bloom Time

5 m

Plant Height

8 m

Spread

Green, Blue, Yellow

Leaf Color

15 - 35 ℃

Ideal Temperature

Images of Blue bean tree

Distribution of Blue bean tree

Distribution Map

Blue bean tree, a distinctive plant, originates from the eastern Himalayas and adjacent areas within the Asian continent. It has been successfully introduced and cultivated in various temperate regions globally, thriving particularly in areas with similar climates to its native range. Blue bean tree has gained popularity and has spread beyond its natural habitat, accentuating its presence in temperate botanical collections and gardens.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Mixed forests, scrub on mountain slopes, wet area in ravines

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Blue bean tree

Every week

Water

Full sun

Sunlight

15 - 35 ℃

Ideal Temperature

Water: Blue bean tree thrives in high-humidity environments, requiring consistent moisture without being waterlogged. Water weekly for lush growth, especially outdoors. As a deciduous plant, blue bean tree's water needs decrease during dormancy, allowing for less frequent irrigation in cooler months.

Fertilize: Fertilizing blue bean tree is essential for vibrant growth. Use balanced fertilizers monthly in spring and summer, reducing as autumn arrives. Avoid overfertilization to protect roots. Seasonal adjustments optimize nutrient intake. Beginners should wear gloves, while experienced gardeners can modify amounts based on plant response and soil tests.

Pruning: Blue bean tree features striking blue pods and requires annual pruning in early to late winter. Essential techniques involve removing dead or damaged wood, thinning crowded areas for better air circulation, and shaping for aesthetics. Clean, sharp tools are vital to prevent disease transmission.

Propagation: Blue bean tree can be propagated by sowing seeds from mature pods, ensuring they are clean to avoid fungal issues. Sow in light-cover moist, well-draining soil. Maintain consistent moisture, provide warmth for germination, and transplant seedlings carefully to individual pots for acclimatization before permanent planting.

Repotting: Repot blue bean tree every 2-3 years in early spring using a spacious container with good drainage. After repotting, maintain consistent moisture and avoid direct sunlight to support recovery and growth, ensuring that care enhances blue bean tree's ornamental appeal.

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