Good Evening Patty, 

Thank you for contacting the U of M Extension Service. 

Please click on the following link from the U of M Extension Yard and Garden website: https://extension.umn.edu/news/understanding-fairy-rings-your-lawn

Here is another link about necrotic ring spot of Kentucky bluegrass: https://extension.colostate.edu/topic-areas/yard-garden/necrotic-ring-spot-of-kentucky-bluegrass-2-900/

Good Luck!

Good Evening Patty, 

I think you know more about necrotic ring spot fungus than I do. We are Extension Master Gardener volunteers who answer yard and garden questions. I am not a certified lawn care specialist and cannot confirm a diagnosis on your sterile turf grass lawn from a photo. 

Here is a link to the U of M Plant Disease Clinic. For a fee, you can send a sample for a diagnosis: https://pdc.umn.edu/

I will provide a link to our Extension Lawn care calendar: https://extension.umn.edu/planting-and-growing-guides/lawn-care-calendar

If you choose to spend resources to get the spots to go away on your lawn, I suggest you contact your lawn care specialist again. 

We have had inquiries from various HOA members requesting information about pollinator gardens and lawns and alternative grasses to Kentucky bluegrass. 

I will include a few links here for you to consider with your HOA: https://extension.umn.edu/lawns-and-landscapes/planting-and-maintaining-fine-fescue-lawn

https://extension.umn.edu/lawns-and-landscapes/flowers-pollinators

Good Luck!

Welcome!