Plant nutrition involves 13 essential minerals: three macronutrients, three secondary nutrients, and seven micronutrients (formerly known as “trace elements”). While needed in smaller quantities, the micronutrients are still essential to plant life.
There are a number of organic fertilizers that can be used to supply these nutrients in an organic vegetable garden. The table below lists only the "N-P-K" values. To supply virtually all the micronutrients, use kelp meal.
|Alfalfa meal||alfalfa is a high-nitrogen plant|
|Bat guano||bat poop mined from the floor of caves|
|Bone meal (raw)||from animal bones|
|Bone meal (steamed)||from animal bones|
|Blood meal||dried blood from slaughterhouses|
|Cottonseed meal***||from cotton seeds|
|Feather meal||from chicken slaughterhouses|
|Fish meal||from fish canneries|
|Greensand||mined from the ocean floor|
|Kelp meal||dried seaweed|
|Phosphate rock||mined sedimentary rock|
|Soy meal||ground soybeans|