Growing Medicinal Herbs: Echinacea Explosion

Medicinal herbs are one of the largest growth areas for health product retailers. But some of them may be grown on contaminated soils, as Paul Smith explains.

While Soil & Health readers, and much of the general public, know that conventionally grown fruit and vegetables contain varying levels of pesticide residues, we are less used to evaluating medicinal herbs in the same critical manner.

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