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Rehmannia
Rehmannia comes from the open woodlands and mountainous slopes of China, and has great cultural significance there. The specific epithet (Rehmannia glutinosa) comes from the Latin word for “sticky” (glutinosus) and refers to the sticky feeling of the leaves, stems, and roots.
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Toxic to Humans
Toxicity
Weeds
Weed or not
Perennial
Lifespan
Herb
Plant Type
Green
Leaf Color
Red, Pink, Purple
Flower Color
Green, Red, Purple, Pink
Stem Color
Semi-evergreen
Leaf type
15 - 38 ℃
Ideal Temperature

Images of Rehmannia

Distribution of Rehmannia

Distribution Map
Rehmannia is originally native to East Asia, having a natural distribution that spans the temperate regions of this area. The plant has also been introduced to parts of Southeast and East Asia, where it has adapted and is now cultivated. Its natural and extended distribution reflects both its native resilience and human cultivation.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Well-drained stony ground along roadsides and in woods, mountain slopes, trailsides
Hemisphere Trend Curve

Culture

Garden Use
Rehmannia bursts forth with spikes of showy flowers from late spring to early summer. The large, foxglove-like blossoms and dark-green rosettes of leaves can be used as a groundcover in sunny, low-maintenance garden sites, at the front edge of borders, and in rock gardens.
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Toxicity

Rehmannia is a mildly toxic plant, with roots containing several toxins. Symptoms include diarrhea, abdominal pain, dizziness, and palpitations. Chronic ingestion can lead to abdominal distension and loose stools. Although the plant poses little poisoning risk in the wild, those consuming products with rehmannia plant parts are at higher risk.
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Weed Control

Rehmannia is a native Korean weed found throughout eastern and northern Asia. It has a high potential for becoming an invasive and/or noxious weed in other parts of the world. Each plant can produce thousands of seeds per fruit, making it a pervasive spreader. They also can host a range of pests that threaten other native species. This is an herbicide-resistant weed, so several seasons of pulling before seed pods form is necessary for effective removal.
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Care Guide for Rehmannia

Every week
Water
Full sun
Sunlight
15 - 38 ℃
Ideal Temperature
Garden Soil
Soil Type
Water: Rehmannia thrives in moist environments and requires consistent weekly watering for optimal health. As an herbaceous perennial, it benefits from outdoor cultivation where natural rainfall enhances its growth cycle and water supply.
Fertilize: Rehmannia thrives with balanced nutrition fertilizers, particularly high phosphorus blends, applied every 4-6 weeks in spring and summer for optimal growth and blooming. Adjust feeding during dormant seasons to avoid over-fertilization, which can harm roots. Ensure even distribution and thorough watering for effective absorption.
Repotting: Repot 'rehmannia' every 2-3 years in spring, using a medium-sized pot for root space. Post-repotting, maintain consistently moist soil and bright, indirect light. Following this care regimen will promote vibrant foliage and overall plant health.
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