4fcb4a28_Quick_Guide_to_Plant_Nutrition__Signs_of_Deficiency
[Primary Nutrients] Nitrogen (N) [Function in Plant] Chlorophyll production; promotes rapid growth and maturation; major component of plant proteins and genetic material [Sources for Fertilizer] Coffee grounds Blood meal Alfalfa meal Seaweed Pee (yes, really) [Signs of Deficiency] 
Pale to yellow leaves; slow or stunted growth; brown or dry leaf tips; low yield
A Quick Guide to Plant Nutrition
Signs of Deficiency