I would put down some fungicide. You will be necessarilly creating the perfect environment for fungus, don't let it get started. Something like Headway G...

 

You missed the most important part of laying sod, ground preparation.

What did you do with the existing lawn before? What type of grass? Did you add any compost/sand/top soil?

 

I would put down some fungicide. You will be necessarilly creating the perfect environment for fungus, don't let it get started. Something like Headway G...

I have azoxy 2sc in liquid form. Would applying a fungicide soon after installation of the sod inhibit rooting?

 

Water and fungicide that's it. No need to make it any more difficult than that.

 

I would put down some fungicide. You will be necessarilly creating the perfect environment for fungus, don't let it get started. Something like Headway G...

I have azoxy 2sc in liquid form. Would applying a fungicide soon after installation of the sod inhibit rooting?

The fungicide shouldn't cause that. Pre-em could though, so avoid that.

 

One week after install. 100 degree days. Watering twice a day. Should it look better? It's mostly green so I guess I haven't killed it but some parts (mostly edges of sod) are yellowish. To be fair, sod didn't look any better when I installed.

 

Considering the conditions, I think it looks great. The edges are more stressed obviously, but go ahead and slice that deep through any established lawn and you are going to create stress around the incision. Sliced roots, sliced stolons, etc.

It's going to look patchwork for awhile. If an entire piece goes brown, it'll be because it didn't root and you'll be able to pull it right up and put down another.

 

Any basic Seaweed tonic will help the roots grow