Grass Issue?
 

I have an issue with a section of my grass, after this past winter season.
The grass in question was fine last Fall, no issues. The patch of grass in question, is roughly 16x10, and appears spongy in some places when walking on.

There are no holes or tunnels on the surface, at first I thought it may be grubs,
or maybe just a nitrogen deficiency, what's your thoughts and opinions.

Thanks.

The test for grubs is simple. Pour soapy water on the area. If there are grubs, they will surface in about 15 minutes.

Classic grub symptoms..

https://www.truesdalelandscaping.com...mes-snow-mold/

Hello, a possibility of this might be from snow mold. This link shows some damage from it.

When was the last time you dethatched it?

I (my lawn)had grubs last year. Was told by the lawn & garden center to treat from late spring to fall because the grubs breed during winter and new batch start activity in spring. They said if you treat before they start to feed you are wasting your time & money.

A neighbor had a patch of real spongie lawn and it turned out to be a major ant colony.


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Just dethatched this Spring.

It is grub season...
Can you use the soap and water technique?
It won't kill them, but it should force them to the surface for verification.
Go beyond the edges of the brown patch.

Be careful. When the word gets out that you have grubs you will suddenly
have a lot of skunks in your yard tearing up the grass for you...

I’ll go with this. Especially if that area held a little water and froze. I don’t see any mole tunnels in that area if there were grubs the moles would have been after them.

It is possible, but snow mold usually has a thatch problem attached to it.

Years ago. I took a section of my lawn to the UNH Extension school in Durham.
I was directed to one office/professor.
And he imediately promptly answered my question.
Had no appointment. Just walked in.

Unh
 

^^^^^ Yes this ^^^^^^^^

I believe UNH will pretty much test your soil, analyze your grass all for free!….or at least it was…

Dan

UNH Testing
 

I had my lawn tested this year. Took about 4 weeks after sending in soil sample. Cost $20. My lawn has been struggling for a few years and they said I need Potassium. I added some a few weeks ago and its already recovering. Best $20 I've spent.

https://extension.unh.edu/agricultur...sting-services

Grow flowers and bushes.

Circling back from my original Post.
I put down some Grubex, and many grubs came to the surface and died !
Problem solved !

However now, I'm left with a huge brown spot in the lawn, is it dead, and what can I do to bring back that lawn ?

Buy sod from a good local gardening center. Dig up or turn in the old lawn, wet it good, then install the sod. Make sure you Grubex around the green grass close to the brown grass to eliminate all the grubs.

Rake. Put down repair grass of whatever brand you use - usually has a mix of annual and perennial seed. Keep most until the first sign of green. Then water deeply when we don't have a lot of rain.

The annual should come up rather quickly, and the perennial will fill in over time. Contractor mixes are designed like this to get a quick lawn into place for a sale; but generally only come in large quantities - too much for such a small repair.

Yes it is dead. Grubs eat the roots of the grass. I would go with John’s option.


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