Symphytum x uplandicum - Russian Comfrey

Hardy / perennial / medicinal herb, manure / erratic germination / H. 120 cm/ sun to shade/ well drained soil / blossom colour mauve purple / flowering time  5,6,7

The most commonly used species is Russian comfrey Symphytum × uplandicum ,which is a cross or hybrid of Symphytum officinale (Common Comfrey) and Symphytum asperum (Rough Comfrey).