Here is comfrey we have easily grown in the past and used as a compost activater. I've not only put it within the compost heap but soaked it for three weeks in buckets to use as a fertiliser. It's roots grow a long way down (try and dig it out and you find this). It gains it's nutrients apparently by this deep rooting of the plant. It is said to be a very basic need of growing an organic garden. The plant is said to be a weed barrier since it is very invasive. Here we put it on the other side of logs we had framing our herb and vegetable garden. The sub-tropical area we were at - means it grew very hardy.
