The kidneys are paired retroperitoneal structures that are normally located between the transverse processes of T12-L3 vertebrae, with the left kidney typically somewhat more superior in position than the right. The upper poles are normally oriented more medially and posteriorly than the lower poles.
Growing Comfrey in Pots. Comfrey will grow in pots (at least 3 gallon), containers such as plastic tubs, or 5-gallon plastic buckets but they do better when not grown in a pot. They have deep roots so prefer growing in the garden where they get more nutrients. The containers need drainage holes in the bottom. Add fertilizer to the potting soil.
Symphytum officinale, or comfrey herb plant, has a long history of use as a medicinal herb but not as a culinary plant. Otherwise known as knitbone or slippery root, comfrey plants have been used medicinally since 400 BC to stop heavy bleeding and to treat bronchial issues.omfrey plants generally prefer shade to part shade exposures in warm moist soil, although some cultivars require full sunlight to attain highest yields. There are some aggressive species and many self-sow readily. Propagation can be done via seed, division or separation.