Tuberous comfrey (Symphytum tuberosum)

Tuberous comfrey

Tuberous comfrey (Symphytum tuberosum) is a hardy plant found throughout Europe and introduced in western North America. Its leaves are slightly hairy and the fragrant flowers attract multiple types of bees. The leaves are mildly toxic when raw, but can be safely eaten if cooked. The root is also consumable, but is typically roasted, ground, and used as an alternative to coffee.

Scientific classification

Species

Tuberous comfrey (Symphytum tuberosum)

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Perennial

Lifespan

Herb

Plant Type

Spring, Summer

Bloom Time

2.5 cm

Flower Size

Yellow, Cream

Flower Color

Green, Yellow, Cream

Stem Color

Deciduous

Leaf type

5 - 32 ℃

Ideal Temperature

Images of Tuberous comfrey

Distribution of Tuberous comfrey

Distribution Map

Symphytum tuberosum, a plant with a natural range extending across temperate regions of Europe, is known for thriving across diverse habitats in its native realm. Beyond its endemic territories, tuberous comfrey has been cultivated, signaling its adaptation to environments outside its indigenous locations. This ability to be cultivated suggests tuberous comfrey can maintain its growth in a variety of climates and settings.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Woods, scrub, riversides

Hemisphere Trend Curve

Northern

Sorthern

Toxicity

Tuberous comfrey is mildly toxic to humans, cats, and dogs. All parts contain alkaloids causing nausea, vomiting, dizziness, and headaches. Cats and dogs may exhibit gastrointestinal upset, drooling, vomiting, or diarrhea upon ingestion. Immediate veterinary care is essential if tuberous comfrey poisoning is suspected to ensure effective treatment and prevent further health complications. Caution is advised to avoid accidental ingestion.

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Care Guide for Tuberous comfrey

Every week

Water

Full sun

Sunlight

5 - 32 ℃

Ideal Temperature

Water: Originating from temperate regions, tuberous comfrey prefers moderate soil moisture and thrives with weekly watering. It can endure brief dry periods. Grown mainly outdoors, tuberous comfrey's growth and flowering are influenced by water availability, highlighting its resilience and adaptability.

Fertilize: Fertilizing tuberous comfrey with a balanced 10-10-10 mix quarterly promotes growth, enhancing foliage and roots. Reduce winter applications due to lower growth rates. Avoid over-fertilization, and always water before and after to aid nutrient absorption. Accurate application is vital for tuberous comfrey's health.

Pruning: Tuberous comfrey is a perennial with tuberous roots and yellow flowers. Prune dead foliage and spent flowers in early to late spring to promote growth, prevent disease, and maintain appearance. This timing supports robust flowering; consult horticultural guides for specific pruning techniques.

Propagation: Tuberous comfrey is a hardy perennial with fleshy roots and broad leaves. Propagation via division is recommended, separating root tubers during dormancy. Each section should include a growth bud and be replanted in well-drained soil with adequate moisture for successful regrowth and preservation of characteristics.

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Images of Tuberous comfrey

Distribution of Tuberous comfrey

Toxicity

Care Guide for Tuberous comfrey

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