This is a fascinating article published by Friends of the Earth which gives all gardeners food for thought!…
Symphytum genus (Comfrey). There are about 25-35 species of hairy perennials. They can grow very fast and will become invasive in the garden. The leaves are alternate with flowers that are either pink, blue, white or cream.
Perennials, Evergreens, Shrubs
N. Africa, W Asia.
Suitable for wild gardens. Use to make liquid manure.
They are fully hardy and they can be easily grown in sun or partial-shade in moist, well-dug soil with added manure.
Division in spring or by seed in autumn; usually self-seeds naturally. Propagate cultivators by division only.
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