Plant Nutrient deficiency Project

I want to use the Husky lens to detect Nutrient deficiencies in Hydroponic plants based on color,  would there be any limitations on how many colors samples to train the Husky lens with?  The end goal would be to detect: 
Health Plant
Zinc Deficiency
Potassium Deficiency
Iron Deficiency
Nitrogen Deficiency
For each Deficiency display an alarm 

If anyone could help me with this it would be greatly appreciated!