Organic fertilizers for potassium and phosphorus

Ranked by richness

Organic sources for nitrogen
Urine
Cut grass
Nettles
Nitrogen fixing crops

Organic sources for phosphorus
Bird Guano
Fish meal, crab shrimps, shells
Bone meal (or Egg shells)
Granite or phosphorus rock dust
Compost toilet sewage
Worm castings
Mushroom compost
Horse manure
Leaf mold (oak)
Buckwheat
Clover
Hair

Organic sources for potassium
Ash
Hay
Sawdust and wood
Cow manure
Comfrey
Kelp
Rock dust
Fruit skins
Clay

Organic sources for calcium and other micronutrients
Egg shells
Lime
Kelp
Coming in soon