Dropped a little over .75 lbs/1000 N (Oceangro).

Looks like nutsedge to me. The Ortho nutsedge killer works well but you might not want to spray it on new grass.

Overseeded with 90/10 TTTF KBG and Lebanon starter fert with mesotrione. Covered the bare spots (poa I killed back in spring) with peat moss.

I had a ton of nutsedge as well this year. I lack your patience, so I deployed Ortho nutsedge killer. It works.

$135 for 50 pounds. I picked up not sure what they charge to ship.

Spot sprayed some crabgrass. Prodiamine overall did a great job this year but a little CG broke through near the pavement.

Tuckahoe Turf Farm in Hammonton has some high quality seed. I use their Athletic Mix which is 90/10 TTTF/KBG. Their sod is widely used including by NFL and MLB stadiums.

I am thinking about trying an August overseed this year with dithopyr pre-m around mid-September. I use up my yearly max of prodiamine in the spring. The worst that can happen is the dithiopyr kills my new growth and I wasted money on seed.

Disease Ex (azoxy granular) as a preventative. Spot sprayed some clover and nutsedge with tenacity.

How many SF is your yard? Is a glypho burndown feasible?

I have areas similar to the first and third pics that I think are poa. Not sure which poa but they were lime green in the spring, and then flopped over and thinned out.

Morph do you apply Grubex every year as a rule?

Is it possible the matted areas are poa that you resurrected with the slit seeder? That happened to me this year. I slit seeded/aerated with sod quality 90/10 TTTF/KBG last fall, and then this spring I had some patches of lime green poa (probably triv). I killed some spots and reseeded, but others I...

I have full sun in my front yard with very good drainage. When it gets really hot my grass gets fried. I find heavy watering really does help. Its not an immediate fix but after a few days it gets going. Obviously this approach encourages fungus, shallow rooted weeds etc. Like everything else about ...

I have been using the same regimen as you. I use the hose end sprayer for prop and the granular azoxy. It seems to be working, although it is probably more cost effective to get the gallon jugs and use a 4 gallon backpack sprayer. The time increase is my biggest concern for me as it would probably t...

Mowed and bagged. Swapped mower blades for first time this season (I know, I know they were dinged up pretty well). Powerwashed mower deck.

Nutsedge made an appearance. Deployed Ortho Nutsedge Killer from hose end sprayer.

Maintaining a 50000 SF lawn sounds like a massive undertaking. Have you considered a tow sprayer?

Seedsuperstore is popular. There is also GCI Turf TTTF available on Yard Mastery. Its actually a 90/10 TTTF KBG blend which is common to add diversity and spread.