A fertilizer composition comprising a base composition, a plurality of wool pellets comprising wool, and at least one animal product selected from the group consisting of blood meal, meat and bone meal, fish meal, and tankage. Related methods of forming the fertilizer composition comprise providing a plurality of wool pellets to a base composition, adding the at least one animal product to the base composition, and mixing the plurality of wool pellets, the at least one animal product, and the base composition to form a fertilizer composition comprising the plurality of wool pellets, the at least one animal product, and the base composition. Related methods of providing at least one nutrient to a plant are also described.
