Fertilizer burn

Fertilizer Leaf scorch Chlorosis
Fertilizer burn on a leaf.

Fertilizer burn is defined as leaf scorch resulting from over-fertilization, usually referring to excess nitrogen salts.[1][2][3]

Fertilizer burn is the result of desiccation of plant tissues due to osmotic stress, creating a state of hypertonicity.

Fertilizers vary in their tendency to burn roughly in accordance with their salt index.[4]


Fertilizer burn can be remedied by soaking the soil with water to flush out excess salts.[1] It can be prevented by applying only dilute or controlled-release fertilizer products.[1][5]

See also


  1. ^ a b c Andrews, Gail Glick (January 1998). "Gardening and Water Quality Protection: Understanding Nitrogen Fertilizers" (PDF). Oregon State University Extension Service.
  2. ^ Cornell University Plant Disease Diagnostic Clinic (August 1999). "Leaf Scorch Factsheet". Archived from the original on 20 February 2010.
  3. ^ Jones, Susan (2008). "Fertilizer Burn". American Orchid Society. Archived from the original on December 25, 2010.
  4. ^ Labosk, Carrie. "Understanding Salt Index of Fertilizers" (PDF). University of Wisconsin-Madison Department of Soil Science. Archived from the original (PDF) on 2013-05-28.
  5. ^ Parsons, Jerry M. "Lawn Fertilization". PlantAnswers.com. Archived from the original on 2008-09-05.