I have just bought 5 small comfrey plants to use for adding to my compost pile and also as a mulch. I know that comfrey can be somewhat invasive, but I was under the imprssion that if left undisturbed that it would stay put. But when I read the label on the pots, I saw that it is recommended that the comfrey be planted in a POT which I am suprised about. Does anyone have any thoughts on the growing of comfrey and the most suitable home for it - garden bed or pot? Thanks so much, from Dottigirl.