Most of the soil tests we receive for vegetable gardens are high in phosphorus and potassium leaving nitrogen as the nutrient needed most. However, many of our organic fertilizers contain similar amounts of all three nutrients.
So, what can we use that provides more nitrogen then phosphorus and potassium? Following is a short list of such fertilizers.
Product Analysis Pounds/100 sq. ft. Notes
Blood Meal 12-0-0 5 – 10 Can burn plants if overapplied
Cottonseed Meal 6-0.4-1.5 10
Soybean Meal 7-2-18 8 May have pesticide carryover unless labeled as pesticide-free
Feed stores will often sell these products. Colorado State University has an excellent publication on organic fertilizers at
http://www.ext.colostate.edu/mg/gardennotes/234.pdf . (Ward Upham)