| http://www.w3.org/ns/prov#value | - Now is the time to add any of the soil amendments, such as bone meal, blood meal, or superphosphate, that provide a slow, continuous supply of phosphorus.Other fertilizers are byproducts of the poultry, meat, or other industries: bone meal, blood meal, poultry manure and wastes.Each spring, their roses are fed with a mix of controlled-release fertilizer, blood meal, and bonemeal.
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