Joe Klerekoper wrote:I'm just learning about comfrey so a few questions. How does it improve the soil around fruit trees? Is is just leaving the leaves as they die for compost or does it do something else for the soil. My place is mostly woods but I have a garden, some fruit trees and a large grass area that I use for a burn pile as I clear trees and brush. I'm sure I can find some places to plant comfrey that I won't have to worry about it getting out of control. Would like to use some as compost greens, but does it help the fruit trees if I just leave it natural around them? I'm in zone 7b
What I know about comfrey. It does do something beyond providing mass for decomposition. As a “bioaccumulator” it absorbs particular minerals out of the soil, which provides those minerals to surrounding plants as they decompose.
Comfrey has mucilagenous roots. In moist conditions, if a root is wounded there is an exudate which promotes healing, as medicine for people and livestock and for its own roots.
Comfrey has allantoin, I don’t know if it’s in leaves and roots or concentrated in just one or the other.
Worms have grown in abundance next to comfrey roots in my gardens, promoting soil aggregates. (The highly desirable cottage cheese appearance of soil, which indicates that the soil will allow water to soak in).
I think if you mow or cut the comfrey it will be more beneficial for soil development and adjacent trees. This is because cutting back stimulates the plant to provide root exudates for soil bacteria and fungi. The fungi carry nutrients to the roots of the comfrey plants. The bacteria produce ?is it called glomulin? a gluey substance which also contributes to the production of soil aggregates. But if you don’t have time to cut it down, don’t worry!
Comfrey promotes the soil food web.
Comfrey does fabulous things for the soil!
As for whether it’s good right up next to trees, I cannot say. Someone posted above problems with creating habitat for rodents that eat bark.