Is Comfrey High in Calcium? Understanding Its Nutritional Value
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3 min read
While often praised by gardeners for its nutrient-accumulating properties, analysis of Russian comfrey (Bocking 14) showed it contains approximately 2.77% calcium on a dry matter basis. Comfrey's reputation as a mineral powerhouse stems from its deep root system, which draws up nutrients from inaccessible subsoil. It is indeed high in calcium and many other minerals, though this is primarily relevant for its use as a fertilizer rather than a human supplement due to significant safety concerns.
