Round brown spots on grass blade

madymo3dOctober 24, 2010

My grass has been dying a slow death over the last few years. Every years I do something I think will help only to watch the grass a little weaker the next year. The most immediate problem is a widespread browning. Upon closer inspection, there are tiny round brown spots. Some blade tips are brown and others are green.

I tried searching for "mold" and "brown spots" in this forum but many lack pictures for me to identify. What do I have?

Here is a link that might be useful:

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    Bookmark   October 24, 2010 at 4:33PM
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Okay I did more searching on google and here. I think it's rust. 3 years in this house, this is the first time I've seen rust. I'm not big on lawns so I tend to neglect them and let nature take its course. I fertilize irregularly, water irregularly, and cut irregularly. I do follow a few rules like not cutting too short and mulch cut. This year I went around with Round Up spot treating weeds. Inevitably, small areas of grass around the weed also got affected. With lots of weeds, my lawn turned into patches of dead brown grass. Overall I just ended up with a weak lawn.

    Bookmark   October 24, 2010 at 6:05PM
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If nothing, you have to fertilize, i think rain will provide enough water for sustaining the lawn.

I was watering my lawn 3x a week and ran up close to $600 in water bill and my lawn was turning brown with dollar spots already visible. I quickly bought 10-10-10 fertilizer and then a high nitrogen fertilizer 2 weeks later. Lucky that I caught it in early september when lawn was growing and it has recovered for the most part.

    Bookmark   October 28, 2010 at 9:51AM
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Okay, I was afraid it's too late to fertilize so I was planning on dormant seeding later this year, put down starter fertilizer with pre-emergent, then worry about it next spring. But you think I should go ahead and fertilize, keep watering and get it healthy before first frost? Temp swing has been wild lately. 65 one week then 45 the next.

The water bill is one reason I'm not big on lawn care. I have better places to spend $600 than to put spread it on the ground and cut it down...

    Bookmark   October 28, 2010 at 11:42AM
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Hey i had the same thing during the summer. It is rust and i had it on the front and back lawns. I added scotts turfbuilder because i knew i hadnt fertilized in a while and it worked great, the rust disappeared and the grass started to grow a nice thick green. i didnt do anythign else. I would add soem fertilizer and just let the grass grow for the remaining weeks before the cold kicks in. you can also dormant seed just before the first snow fall. By next spring it should be ok. Good luck.

    Bookmark   October 28, 2010 at 12:24PM
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dchall_san_antonio(8 San Antonio)

Seems to me rust is one of the ugly-but-harmless diseases. If that is what I'm thinking of you could spray it with soapy water and be done with it.

    Bookmark   October 29, 2010 at 2:10PM
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