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.
You'll just need two things: comfrey root and organic eggshells. Eggshells are used because they contain 27 minerals and loads of calcium, so they contain the ideal building materials to regrow your teeth. In fact, the composition of eggshells is very similar to the composition of our teeth and bones. Comfrey root is used because it accelerates bone, teeth and tissue growth.