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Dealing With Non-Pattern Lawn Discoloration

NDSU Extension Service horticulturists Ron Smith and Todd Weinmann provide some advice for treating discoloration in your lawn.

Does your lawn have random patches of yellowing or other discoloration like the lawn in this photo provided by Todd Weinmann, Cass County Extension Horticulturist?

Non-Pattern Lawn DiscolorationWhat to do? The best thing: wait 30 days and with normal weather temperatures rising, most will disappear. This is caused by a number of factors:

  1. Soil being too wet or cold in those spots due to compaction
  2. Juvenile roots – root system just kicking in
  3. Previous season injury from grub feeding activity on the root system
  4. Differences in green-up rates of different grasses
  5. Obstruction to good root development due to tree roots or construction debris buried beneath the surface.
  6. In some cases, iron deficiency being manifested due to high pH of soil or one of the reasons mentioned above.
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