Old enough manure to add directly to a new garden plot?
A relative of mine has horses and so horse manure aplenty.
He says that the very large pile I filled my buckets from today has been there since about November 2011 (outside the barn subject to the elements). It is very crumbly and without odour. Does this seem mature enough manure to add directly to a just created (and not yet planted) perennial garden bed?
Tomorrow I take delivery of one cubic yard of garden soil. This is described by the shipper as "a custom blend of mineral soil, manure, peat, and compost". It is this soil that will form the bulk of the new garden bed. But now with this newly sourced horse manure I was thinking of adding it to the above described "garden soil" as well as a 30 kg bag of "volcanic rock dust". What do you think guys and gals...does this sound like a good plan?