Nutrition Diagnostics

Here is some helpful nutrition diagnostic helpers. Make sure you read Mark Taylor's papers on plant nutrition and soil medium.

##The following is a plant nutrient deficiency by location:

Lower (older) leaves

• Phosphorus
• Potassium
• Magnesium
• Nitrogen (quickly affects entire plant)

Upper (newer) leaves

• Calcium
• Sulfer
• micros: B, Mn, Mo, Fe, Zn, Cu

##Deficiency by color:

###Yellow

• Nitrogen
• Magnesium
• Iron
• Sulfur
• Manganese
• Copper
• Zinc

###Red

• Phosphorus
• Zinc

###Purple

• Phosphorus