Seeded grass turning yellow - Knowledgebase Question

St Charles, Il
Avatar for megankolasi
Question by megankolasi
July 20, 2010

This past spring, we seeded some grass in patches and it took beautifully. However, now those patches are turning yellow while the rest of our lawn is still green. We water the lawn 2 hrs/week when it doesn't rain and have ChemLawn come out and fertilize/kill weeds every 5 weeks. Any ideas on what's the cause?

Answer from NGA
July 20, 2010
I'm not really sure if there is an underlying cause for the yellowing - compacted soil/poor drainage; a fungal disease, etc., or if you've overseeded with a cool season grass that's trying to go dormant because of the warm temperatures. Since you have ChemLawn coming over, why not have them check for diseases (should be apparent by spots on the blades or crowns of the grass) or ask them to probe the soil to make sure the water you are applying is actually percolating down into those areas. Generally they carry core probes with them and can take a sample of the soil beneath the roots of the grass. Hope you determine just what the problem might be before it spreads! Good luck with your lawn!

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