Necrotic Ring Spot Treatment

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Necrotic Ring Spot Control

Necrotic Ring Spot is a widespread disease of cool season turfgrasses. It appears in the Rocky Mountain area between May and mid-October.

It's a serious disease of Kentucky Bluegrass and has been increasing on Bentgrass, annual and rough Bluegrasses, and Fine Fescues. At NaturaLawn of America, we've developed a complete program specifically targeting the destructive effects of Necrotic Ring Spot disease.


  • Circular patches of infected turf may develop whenever turf is under stress.
  • Patches first appear as small, light green spots 2-4 inches in diameter, but may exceed 3 feet.
  • As turf succumbs to infection, the leaves turn reddish brown to bronze and then fade to a light straw color.
  • All of the plants in a patch may die, resulting in a sunken or crater-like depression. It is not uncommon for the turf around the edges of the infected area to be greener in color.
  • The spread of Necrotic Ring Spot is stimulated by turf under stress, either by cool, wet weather conditions or by heat and drought conditions. Both of these conditions have been known to intensify the infected areas.

Disease Cycle:

Necrotic Ring Spot is in the soil and is most active when the temperature is 68-82° F. Activity normally begins in early May and is active until mid-October. Recovery is slow, and severely infected plants are easily removed from the turf because of the extensive rotting of the roots. Re-sodding the disease areas may not be an alternative since there are some cases of Necrotic Ring Spot reappearing in the new sod. Heavy soil compaction also contributes to the disease.

So how do you get rid of Necrotic Ring Spot?

NaturaLawn® of America's service will:

  • Assess that your lawn actually has Necrotic Ring Spot.
  • Provide comprehensive organic-based programs in order to stimulate root growth.
  • Recommend cultural changes to watering patterns.
  • Suggest changes to mowing practices to protect the plants' defense system.
  • Address soil compaction by aerating at the optimal time of the year.
  • Seed the turf new and improved disease resistant seed varieties.

For a free price quote on Necrotic Ring Spot Control service, enter your zip code at the top of this page to find your local provider, or contact our NaturaLawn of America office today for more information.

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My lawn is beautiful.  It has never looked this good.  It looks like lush green velvet.  We only had one dandelion this spring and it was on the edge of our property, so it must have been the neighbor’s!

Jennifer L. Lloyd – Bear, DE

For over 22 years, NaturaLawn of America has been creating naturally beautiful lawns that are safer for you, your family, pets and the environment.  Of course our satisfied customers say its best!
In less than a year, my lawn has gone from one of the worst on the block to among the best.  This is quite an accomplishment considering we have well water and, therefore, never water the lawn.  The  service is also top notch – friendly, knowledgeable and always willing to explain why they’re doing what they’re doing.

Stewart Kaufman – Southbury, CT

NaturaLawn of America has cared for my lawns now for 10 years (2 houses) and I am completely satisfied with your company.  My service technician is friendly, caring and knowledgeable.  I’m happy with the results, how you care for my lawn and the prices you charge – happy enough that I recommend you to others and I tear up ads from competitors without even reading them.
My husband and I are currently acquiring a house in New Hampshire.  There is no question that I will want NaturaLawn of America service at that house.  It is a true pleasure to work with a “national” company that treats their customers in a local business manner.

Anne Bullitt – Newark, DE

I’m just dropping you a note to let you know that we are very pleased with your lawn service, the way we are treated and the beautification of our lawn.  Many families have seen our lawn and are very impressed by the way it looks.  They are even more impressed that you are an organic-based company and use 85% less chemicals and pesticides.  We have referred many of our friends and neighbors and will continue to refer people as the opportunity arises.

Jack & Sherrie Decker – Plainview, MN

Our lawn is beautiful.  Thank you for the great results AND for protecting my family and the environment from unnecessary chemicals and pesticides.  It’s nice to have a lawn care company that is concerned about my lawn, my family and the environment.  When people are looking for a healthy, nice lawn, friendly service AND a safer lawn care option, I highly recommend they call NaturaLawn of America.

Pete Plimmer – Wilmington, DE

You are doing a great job! We are glad we switched to NaturaLawn of America and are spreading the word about the super job you do.

Steve Pfannenstein – Rockville, MN

I wanted to write and let you know how pleased I am with NaturaLawn of America.  I had never used a lawn service before.  I’m against putting more chemicals into the environment, so I decided to see what you could do organically.  My lawn was 1 ½ years old – builder grade seed on builder soil! It was a lawn in need of some help, but I didn’t know how wonderful it could look.
Two days ago, my neighbor (who used one of the top chemical lawn companies) sounded a little baffled and asked what I do to my lawn – It looks like a carpet!  We just smiled and said “NaturaLawn of America”.  That’s when I took a good look at my lawn and everyone else’s - our lawn is thick and green.  Despite the recent drought, despite our lack of attention to our lawn, and despite its humble beginnings, it is a magnificent piece of work.

Paul & Doris Pavlichek – Mount Airy, MD

This is our second year with NaturaLawn of America and I can’t say how much we appreciate your work. The yard is awesome!

Don Strei – Elk River, MN