(March 2007)

This is how the symptoms would look like on seed geraniums when the pH was measured at 5.3 and E.C. at 2.85 millimhos. The intriguing question is why some adjacent plants showed no symptoms and a pH of 6.0 and E.C of 2.2 millimhos? I think this may be due to lime distribution in the growing medium. The problem can be corrected by feeding potassium bicarbonate solution 2-3 times. Don’t mix it with other fertilizers. What you see is toxicity of iron and manganese due to an acidic pH.

Dr. M.Mirza