[gear_up]

Hi folks,

I have a relatively new lawn that's developed a problem resulting in the die-off of maybe 40-60% of the grass in the affected areas. See pics.

This is a sod lawn that went down in July on eastern Long Island. The sod is a mix of KBG, TTTF, and PR on top of 8" of top soil, all professionally installed.

This lawn had been doing great until mid-October, when these problems developed, well prior to the first frost of the season.

It looks like it might be black spot or something similar that's maybe hitting the PR first? The neighbors' lawns are dark green and looking healthy. . .

Can you folks let me know your thoughts? What's the right treatment considering it's almost December?

Thank you!

 

[SlowMowTurf]

Are you sure it's not just going dormant? Cutting off water drastically would cause dormancy...

Most lawns in my neighborhood are irrigated, but at often quite different levels. Those that under-irrigate OR cut water early Sept had browned quite a bit by Oct.
I'd leave the turf alone and see what it looks like in spring.

 

[SlowMowTurf]

Is this your personal lawn OR a lawn you care for?
Who put the lawn in?
Could always call installer, but with 8" topsoil under dirt that came with the sod, that's a LOT of good dirt for the turf.

 

[FLC2000]

Has it been fertilized at all? How much water has it gotten in the last month?

 

[Toro44]

New sod is always quick to go dormant around my area also, it just doesn’t have the root structure yet.

 

[RigglePLC]

SlowMow is probably right.
Also, some high-rated top-quality Kentucky bluegrass cultivars are a bit slow to green up under cold conditions in spring. Probably the same thing happens in fall. What are your soil temperatures? Air temps?
See:
Greencast.com
Did you get the big snowstorm?
Odd around here. We had 12 inches of snow last week. Then it melted and the grass is green again. Some leaf raking has started again.

 

[walkinonwater27]

I’d say it’s going dormant, give it a good winterizer, timing couldn’t be more perfect to get a ton of root growth and a nice spring pop. Sod needs a good winterizer to get a great color in the spring it’s very needy.