Solomon's Seal

Polygonatum multiflorum

Family: Asparagaceae Part used: Rhizome

Key Compounds

• Steroidal saponins (polygonatin)
• Mucilage (polysaccharides)
• Convallarin
• Convallamarin
• Asparagin
• Quercetin
• Kaempferol
• Vitamin A
• Allantoin
• Tannins

Traditional Use

• Connective tissue, tendons, and joints — the primary contemporary Western herbal application; steroidal saponins (principally polygonatin) may influence collagen synthesis and connective tissue metabolism; Matthew Wood's contemporary Western herbal framework describes Solomon's seal as 'reading' and adapting to connective tissue conditions — tightening lax tissue, moistening dry tissue; evidence base is largely traditional and theoretical; used for repetitive strain injuries, ligament damage, joint pain, and over-use injuries in athletes and manual workers; long-term application over weeks to months is the standard approach
• Dry respiratory mucous membranes — demulcent application; the polysaccharide mucilage soothes and moistens irritated or dry respiratory mucosa; traditional European application for dry cough; used in formulas for chronic dry respiratory conditions; the mucilage mechanism is straightforward and consistent with the plant's chemistry
• Vulnerary and wound healing — allantoin content (also present in comfrey and symphytum) supports tissue repair; traditional European topical application for bruises, broken bones, and connective tissue injuries — the same wound-healing and fracture-healing applications attributed to the allantoin in comfrey; lower pyrrolizidine alkaloid concern than comfrey
• Nutritive and restorative tonic — traditional Chinese medicine classification of 黄精 and 玉竹 as yin-tonics; the mucilage and saponin content supports the traditional use for general debility, fatigue, and recovery from illness; the Chinese applications are in a specific TCM diagnostic framework and differ in emphasis from European applications

The rhizome looks like it has been sealed. When the aerial stem dies back each autumn, it leaves a round impression on the surface — clean, smooth, circular, like the mark left by a signet ring in wax. There is one for every year the plant has lived.

Early botanists decided King Solomon had marked these plants. The reasoning was that Solomon was wise, he knew medicine, the marks were clearly a seal, and therefore they were his. This is not rigorous botanical analysis. It is the naming convention of people who found a distinctive plant and wanted to explain it. The scar is simply where the stem breaks off.

The plant still carries the name.

Meet the plant

An arching perennial with a horizontal rhizome, alternate ovate leaves, and pendant pairs of small white tubular flowers hanging from the leaf axils in spring. It grows in woodland shade to 30–90 cm. The blue-black berries that follow the flowers are toxic and should not be eaten. The plant disappears completely above ground in autumn, leaving only the scarred rhizome.

The connective tissue application

The primary contemporary Western herbal use for Solomon’s seal — connective tissue, tendons, and ligaments — is substantially the contribution of Matthew Wood, an American herbalist who described it through clinical practice and elaborated it in The Earthwise Herbal (2008).

Wood’s framework: Solomon’s seal ‘reads’ connective tissue and adapts to its condition — tightening tissue that is too loose (hypermobile joints, lax ligaments) and softening tissue that is too rigid or dry (stiff joints, tight tendons). Whether the mechanism works with this specific directional intelligence is debated. What is established: steroidal saponins in Polygonatum species can influence steroid metabolism and potentially collagen-related pathways. The mucilage provides demulcent activity on dry tissues.

The application has been widely adopted in North American herbal practice for repetitive strain injuries, over-use injuries, hypermobility, and joint pain. It requires long-term use — weeks to months — to show effect.

The Chinese medicine context

Chinese medicine uses Polygonatum in two main applications with different species:

玉竹 (yùzhú) — from P. odoratum. A lung-stomach yin tonic used for yin deficiency conditions: dry cough without phlegm, dry mouth and throat, mild fever from yin deficiency, thirst. The demulcent and moistening action is the primary mechanism.

黄精 (huángjīng) — from P. sibiricum, P. kingianum, or P. cyrtonema. A qi-yin tonic for the spleen, lung, and kidney: fatigue, poor appetite, general debility, premature aging. The adaptogenic and tonic application.

These are different species with different diagnostic indications. The European P. multiflorum is not used interchangeably with either in Chinese medicine. The chemistry overlaps — all Polygonatum species share steroidal saponins and mucilage — but the species, preparations, and diagnostic contexts differ.

What people actually do with it

Decoction (connective tissue, long-term): 1–2 teaspoons dried rhizome per cup, simmered 20 minutes (not steeped — the rhizome requires simmering to extract the saponins and mucilage). 1–2 cups daily. Consistent use over 4–12 weeks for connective tissue applications.

Tincture: 2–4 mL in water, 2–3 times daily. Tincture allows easier standardisation for long-term use.

Topical (bruises, injuries): Strong decoction as a compress on bruised or strained areas. Crushed fresh or rehydrated root as a poultice.

Combined with comfrey (fractures, tissue repair): Traditional formula for bone and connective tissue repair — Solomon’s seal provides saponin and allantoin; comfrey provides higher allantoin concentrations. The pairing reflects the overlapping traditional applications.

Could you grow this yourself?

Solomon’s seal grows well in woodland-style conditions: partial to full shade, moist well-drained soil, neutral to slightly alkaline pH. It spreads slowly by rhizome and is not invasive. Division in autumn is the simplest propagation method. The plant is worth growing for its ornamental value alone — the arching stems with pendant white bells in spring are distinctive. Allow at least three to five years before harvesting rhizome from a cultivated plant.

Solomon’s seal (アマドコロ) in Japan

Japan has P. odoratum var. pluriflorum — アマドコロ (amadokoro, literally ‘sweet place’) — as a native species. The Japanese pharmaceutical tradition follows the Chinese 玉竹 (gyokuchiku) classification for the species; it is used as a yin-tonic and demulcent in kampo formulas.

The Western herbal connective tissue application of Matthew Wood has reached Japan through the global Western herbal supplement market, but this application has no traditional Japanese or Chinese precedent — it is a contemporary Western development.

Things you’re probably wondering

Does Solomon’s seal cause cardiac problems? The convallarin and convallamarin present in Polygonatum species are cardiac glycoside-type compounds, the same class found at much higher concentrations in lily of the valley (Convallaria majalis). At standard therapeutic doses in a prepared infusion or tincture, the concentrations are not a practical concern for most healthy adults. Large doses of raw rhizome would be a different matter. The berries are toxic and should not be consumed.

How long does it take to work for connective tissue? The connective tissue and joint applications require consistent long-term use. Matthew Wood describes months of use for chronic conditions. For acute injuries being supported with Solomon’s seal, expect a minimum of several weeks. This is the nature of connective tissue repair generally — it is slow biology — and the herb works within that timeframe rather than producing rapid results.

Botanical details

The full compound list

See Also

• Comfrey — overlapping allantoin-based wound healing and connective tissue applications; higher potency
• Meadow Cranesbill — connective tissue and joint support from different chemistry
• Plantain — demulcent; overlapping mucous membrane applications

References

• Wood, M. (2008). The Earthwise Herbal: A Complete Guide to Old World Medicinal Plants. North Atlantic Books. (Solomon’s seal connective tissue application)
• Bensky, D. et al. (2004). Chinese Herbal Medicine: Materia Medica (3rd ed.). Eastland Press. (玉竹 and 黄精 monographs)
• Grieve, M. (1931). A Modern Herbal. Dover.
• Hoffmann, D. (2003). Medical Herbalism: The Science and Practice of Herbal Medicine. Healing Arts Press.