What is dollar spot?

Dollar spot is a lawn disease that favors Kentucky Bluegrass. However, in reality it can affect any type of grass.  It is active during the growing season, spring through fall.

What does it look like?

The grass dies in small areas, typically spots that are 1” to 5” in diameter.  The spots can grow together and create a larger diseased area of lawn.  The spots are usually a bleached-out or straw color.  In the morning, a white fungus may appear on the affected areas.

Take your time in determining what caused your lawn problem.  This fungus is often mistaken for damage from a dull lawn mower blade, damage due to a drought and dog urine damage.

From dollar spot to lawn diseases.

The following conditions favor this lawn fungus..........

  • Moderately warm temperatures
  • Excessive moisture
  • Lawns with a heavy thatch
  • Nitrogen deficient lawns (lacks proper fertilization)

How do I eradicate this lawn fungus?

  • Cutting Grass- Don't cut the grass too short.  A longer grass blade is better.  Also, be sure to only mow when the grass is dry.
  • Fertilization- Adjust your fertilization habits. Under fertilizing your lawn can cause low nitrogen levels in your soil. Increasing the nitrogen level in your soil may be your best bet.
  • Watering- Don't over water your lawn.  When you do water, make sure you water deeply and only when necessary.  Never water at night.
  • Aerate your lawn to reduce the thatch level.

If the above methods don't work, you may need to apply a fungicide.  Before you purchase it, be sure to read the label and make sure it controls dollar spot.  Always read the directions before using any type of chemical.  Only apply the chemical to the affected areas.  Also, at some point you may need to repair your lawn.

St. Augustine Grass - A warm season grass common in the Gulf Coast area.