The red root plant refers to the ruddy-colored roots of an evergreen North American shrub in the buckthorn family. The herb is harvested in late autumn when the plant transfers the majority of its tannins, alkaloids, and resin compounds to the roots for winter storage. Red root is typically decocted or tinctured for internal use or used to make strong infusions for use in skin and mouthwashes. Where to buy red root? Red root for sale can be hard to come across in most local grocery stores, so online purchase tends to be easier. We sell red root herb in ¼ pound and full pound quantities.