Comfrey is indeed difficult to obtain and you grow it from cuttings or young plants rather than seeds because the forms that spread seeds are highly invasive. Comfrey is best grown in its own area away from your main plants, often by a compost bin or separate area. You can obtain non-invasive type Bocking #4 from Coe’s Comfrey (www.coescomfrey.com) who will mail out cuttings to all the States but not internationally or to Canada. Be aware that some people (including references on that site) recommend comfrey for purposes other than composting and feeding the soil. However, it’s not considered safe for direct human consumption though it’s excellent for use as a mulch or as a nitrogen boost for a compost heap.
Comfrey is indeed difficult to obtain and you grow it from cuttings or young plants rather than seeds because the forms that spread seeds are highly invasive. Comfrey is best grown in its own area away from your main plants, often by a compost bin or separate area. You can obtain non-invasive type Bocking #4 from Coe’s Comfrey (www.coescomfrey.com) who will mail out cuttings to all the States but not internationally or to Canada. Be aware that some people (including references on that site) recommend comfrey for purposes other than composting and feeding the soil. However, it’s not considered safe for direct human consumption though it’s excellent for use as a mulch or as a nitrogen boost for a compost heap.