That yellow nutsedge.

 

The SA stolons will never win a race. Keep it moist and after a while hit that area and the SA around it with some fertilizer.

Blindside will stunt the SA growth. Paint on glyphosate (the sedge) because spraying other herbicide including Certainty will also stunt the SA.

 

Thanks @GCoco I'm putting down TS Pro 18-3-6 every 7-10 days and based on your prior recommendation I don't plan on spraying blindside again. The grass has started turning more green from the yellow-green it's been over the past few weeks.

As dry as it's been (and apparently will continue to be), I'm watering 30 minutes 3x per week about ~2 hours before sunrise. Have not done the tuna can test to know if this is the right amount. Are you stating that I should wet the problem area down daily?

 

Nothing magic or precise. Just put enough water so the grass stays healthy and growing and the dirt doesn’t turn to concrete. It depends on humidity, temperature, amount of sun, etc.

Seems like it takes forever. A watched pot never boils.

Take a month long round the world trip.

 

After the second post emergent ~30% of my yard was bare where the weeds were. The large 3'x'3 bare area has filled in about 50% however the runners are not really taking root - only spreading across the top of the area.

I'd say about 10% of the yard is left bare - some spots filled in completely, others partially and some not at all. I did the same thing in all areas (black kow and mason's sand), watered the spots often over several weeks, lightly raked to keep the mixture somewhat loose. I've put down 18-3-6 4 times over the past 7 weeks and will do so again after the next good rain. Any suggestions for the spots where nothing has happened?

Awaiting soil test from LSU and will solicit feedback here once received.