Blackeyed-susan (Rudbeckia hirta var. pulcherrima)

Blackeyed-susan

People love to plant blackeyed-susan (Rudbeckia hirta var. pulcherrima) in their gardens because of its attractive, daisy-like appearance. It’s used a lot in erosion control projects because of its extensive root system. Blackeyed-susan is Maryland’s official state flower.

Scientific classification

Species

Blackeyed-susan (Rudbeckia hirta var. pulcherrima)

Asters bellflowers fanflowers and allies

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Perennial, Annual, Biennial

Lifespan

Herb

Plant Type

Spring, Summer, Fall

Bloom Time

90 cm

Plant Height

Semi-evergreen

Leaf type

20 - 35 ℃

Ideal Temperature

Images of Blackeyed-susan

Distribution of Blackeyed-susan

Distribution Map

Blackeyed-susan is native to North America and has been introduced to various regions across temperate zones, particularly in northern and eastern parts of Europe as well as in East Asia. This plant has shown adaptability beyond its original range, thriving in new environments with suitable climates.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Prairie, meadow, field

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Blackeyed-susan

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Originating from grasslands, blackeyed-susan thrives with regular moisture but withstands short dry periods. Weekly watering is essential for hydration. While mainly an outdoor plant, it benefits from ample rain during the growing season for optimal growth and flowering.

Fertilize: For optimal growth, blackeyed-susan requires balanced fertilizers, with high phosphorus during blooming for enhanced flowers. Fertilize monthly using a quarter-strength solution, adjusting for growth stages. Always water blackeyed-susan before and after fertilization to prevent root burn and ensure nutrient absorption.

Pruning: Blackeyed-susan is a vibrant perennial known for its daisy-like flowers. Prune in early to late spring, removing dead stems and leggy growth. Regular deadheading promotes continuous blooming, enhances air circulation, and prevents diseases, leading to a healthy growing season and abundant flowers.

Propagation: Blackeyed-susan features bright, daisy-like flowers with a central cone. Propagation through division is effective; separate established clumps in spring or fall, ensuring each has roots. Replant at the original depth and water well to promote strong root development.

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Images of Blackeyed-susan

Distribution of Blackeyed-susan

Care Guide for Blackeyed-susan

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