Some Common Organic Fertilizers

%
Fertilizer N P K Remarks
Blood 10 1.5 0 A very rapidly-available organic fertilizer
Fish scrap 9 7 0 Do not confuse with fish emulsives which are generally quite low in fertilizer content
Guano, bat 6 9 3 Partially decomposed bat manure from caves
Guano, bird 13 11 3 Partially decomposed bird manure from islands off coast
Kelp or seaweed 1 0.5 9
Bone Meal, raw 4 22 0 Main value is nitrogen since most of the phosphorus is not soluble
Bone Meal, steamed 2 27 0 As a result of steaming under pressure, some nitrogen is lost, but more phosphorus is soluble for use by plants
Cocoa shell 2.5 1 3 Primarily a conditioner for complete fertilizers
Cotton seed meal 6 2.5 2 Generally very acid; useful in alkaline soils
Hoof and horn meal 14 0 0 The steam-treated and ground material is a rather quickly- available source of nitrogen
Cattle manure 0.5 0. 0.5 Improves soil structure.
Chicken manure 0.9 0.5 0.8 Careful! Burns plants easily.
Horse manure 0.6 0.3 0.6 Improves soil structure.
Sheep manure 0.9 0.5 0.8
Swine manure 0.6 0.5 0.4
Manure (spent) 1 1 1
Oyster shells 0.2 0.3 0 Because of their alkalinity, oyster shells are best used for raising pH rather than as a fertilizer
Peat (reed or sedge) 2 0.3 0.3 Best used as a soil conditioner rather than as a fertilizer; breaks down too rapidly
Rice hulls (ground) 0.5 0.2 0.5
Sewage sludge 2 1 1 Examples of activated sludge are Milorganite (Milwaukee, WI) , Hu-Acinite, (Houston, TX) ,Chicagrow (Chicago, IL) and Nitroganic (Pasadena, CA)
Sewage (activated) 6 5 0
Cocoa tankage 4 1.5 2
Garbage tankage 3 3 1
Process tankage 8 2 0
Wood ashes 0 2 6 Quite alkaline; do not use on high pH soils