That's not all too uncommon looking for newer installed sod. Especially with hot temperatures. I wouldn't fertilize now. It's too hot. You should be fine once temps drop and there's more rain.

 

I would first verify that it isn't a sod webworm larvae causing this. Check this link for identifying early indication.

 

All lawns, sod included, will experience browning around the edges especially up against concrete, asphalt or stone. Those capture and radiate more heat and thus will cook your grass adjacent to it. Normal, so just keep going with best practices eg. mowing, watering and feeding at the right time.

 

Any time that there is a sort of "triangle" shape cut of sod like that, especially in that situation, where there is concrete surrounding the sod on 2/3 sides, there will be excessive moisture removal at the apex of the point. This is why it is not recommended to cut "slivers" of sod. Turf is happiest when surrounded by more turf, and when you cut small, diminutive pieces of sod, drying out of the root zone happens much more quickly than say a 18"-20" wide by 60" long roll of sod. This has been the case for me on both of the sod installs I have done. Also, as aforementioned, grass of any type, sod or otherwise, immediately adjacent to asphalt or concrete, will dry out quicker because of the heat radiating off the said surface. Just give those areas some extra H2O and you will be okay. Maybe a light dose of N soon will keep you on the right track as well (absolutely no more than .5 lb N/1000ft^2 in the heat of the summer). Sod normally needs fed about a month after install, as the nutrients available in the soil still attached to the sod will be depleted by then.

Hope this helps.

 

Any time that there is a sort of "triangle" shape cut of sod like that, especially in that situation, where there is concrete surrounding the sod on 2/3 sides, there will be excessive moisture removal at the apex of the point. This is why it is not recommended to cut "slivers" of sod. Turf is happiest when surrounded by more turf, and when you cut small, diminutive pieces of sod, drying out of the root zone happens much more quickly than say a 18"-20" wide by 60" long roll of sod. This has been the case for me on both of the sod installs I have done. Also, as aforementioned, grass of any type, sod or otherwise, immediately adjacent to asphalt or concrete, will dry out quicker because of the heat radiating off the said surface. Just give those areas some extra H2O and you will be okay. Maybe a light dose of N soon will keep you on the right track as well (absolutely no more than .5 lb N/1000ft^2 in the heat of the summer). Sod normally needs fed about a month after install, as the nutrients available in the soil still attached to the sod will be depleted by then.

Hope this helps.

Thanks!! So would at this point i'm about 1 month in. Should i Apply some Milorganite? or a liquid fertilizer (i've seen ads for "Getsunday.com" lawn care......

I only have about 450 Sq ft to worry about.