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.
Every gardener shouId grow some comfrey, says Monty Don. It makes great mulch, the richest compost - and it's also a terrific slug deterrent. Last week I wrote that gardening success is, in large part, down to the ability of the gardener to tune in to the plants, soil, wildlife and natural spirit of the garden.