Southern rockbell (Wahlenbergia marginata)

Southern rockbell

Southern rockbell (Wahlenbergia marginata) is a perennial flower native to eastern and southern Asia which has also been naturalized in North America. It produces a carrot-shaped root and small, bell-like flowers that have earned it the additional nickname Asiatic bellflower.

Scientific classification

Species

Southern rockbell (Wahlenbergia marginata)

Asters bellflowers fanflowers and allies

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Perennial

Lifespan

30 cm

Spread

Green, Blue

Leaf Color

8 mm to 1.3 cm

Flower Size

Purple, Blue

Flower Color

Evergreen

Leaf type

15 - 38 ℃

Ideal Temperature

Spring, Summer, Fall

Growth Season

Images of Southern rockbell

Distribution of Southern rockbell

Distribution Map

Southern rockbell is indigenous to various areas in Asia where it is widely distributed. It has naturally established itself in regions across the continent that includes the Indian Subcontinent, Southeast Asia, East Asia, and some parts of the Far East. Additionally, southern rockbell has been introduced and has adapted to certain temperate localities in the northern and southern hemispheres.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Disturbed sites, waste ground, roadsides

Hemisphere Trend Curve

Northern

Sorthern

Quickly Identify Southern rockbell

Bell-shaped blue flowers with white centers, around 1 inch (2.5 cm) in diameter.

Upright stem hairless, 0.1-0.2 inches (2.5-5 mm) in diameter, with sparse branching.

Basal leaves ovate, 1-2 inches (2.5-5 cm) long, deep green with smooth texture.

Capsular fruits with yellow-brown to brown seeds, dry and opening to disperse seeds.

Overall stature modest, with a blend of green hues and linear-shaped upper leaves.

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Care Guide for Southern rockbell

Every week

Water

Full sun

Sunlight

15 - 38 ℃

Ideal Temperature

Water: Southern rockbell thrives in moderate moisture and benefits from consistent humidity. Water weekly to maintain balance. Although drought-tolerant, it adapts well to seasonal rainfall patterns, allowing it to flourish with natural water availability, making it more suitable for outdoor growth.

Fertilize: Southern rockbell thrives with a balanced nutrient fertilizer, ideally a diluted liquid formula applied monthly during the growing season. Focus on a balanced N-P-K ratio and avoid over-fertilizing. Seasonal adjustments help protect its delicate roots while promoting healthier foliage and vibrant blooms.

Pruning: Southern rockbell flourishes with proper early to late spring pruning, which encourages growth and blooming. Remove dead or overcrowded stems for better air circulation. Regular pruning maintains size and shape, enhancing visual appeal. Always use sharp, clean tools to avoid disease spread.

Propagation: Southern rockbell propagates effectively through cuttings. Choose healthy, non-flowering shoots, cut below a node, and remove lower leaves. Dipping the cut end in rooting hormone aids root development. Use a well-draining soil mix and keep moisture consistent for successful rooting.

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Images of Southern rockbell

Distribution of Southern rockbell

Quickly Identify Southern rockbell

Care Guide for Southern rockbell

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