Randy Lemmon, he must be one of those master gardeners who doesn't know shit about turf.
That fertilizer schedule is wrong and is nothing but a waste of time and money.
Heres your fertilizer basics.--Do not fertilize when the soil temp is below 60 degrees. Warm season grasses need to be close to 75% greened up and the lows at nigh staying above 60 degrees for fert. to be effective.
Mid Feb and mid March are still to cool and there's no reason to fertilize 4 weeks apart. Also. if you have ever applied phosphorous or potassium your middle and last number on your bag, chances are you only need nitrogen, your first number. So if you have applied 10-20-10, 32-3-8 or 18-24-12 or anything in those areas you won't need anything but nitrogen. Ive seen hundreds of soil samples from all the OSU extensions and phos. and pot. stay in the soil for long periods.
The herbicide schedule is close but wrong, . You need two apps of pre m at the start of the year. The apps should be 8 weeks apart and this is what's recommended by the chemical manufacturers.
On the fungicides, just keep an eye on your shit and dont just apply them. These warm season grasses are hearty and generally dont need fungicides.
Watering, water deep and infrequently. Water once or twice a week (depending on temp) and when you do, soak the fuck out of the grass 1-1.5" at a time.
If you have irrigation have your last zone done cycling at sunrise or drag your hose around in the evenings and try to have it dry before sunset. Dont water at 9pm and have your turf wet all night, that can cause fungus and other diseases.
From OKC to Austin, here's what most greens keepers, and weed control companys--Tru Green's, Scott's and most independent chemical applicators do.
Here's a schedule company's dont want you to see or understand. Because if you did your yard would be pretty damn good and you might not need them.
Theres a window of time to apply everything correctly but for DIy'ers here's some good general times/dates.
This is a warm season turf (Bermuda, Tif, Zoysia, St Augustines) turf schedule.
January 15th Preemergent and IF your grass is completely dormant and has weeds apply round up as needed to kill any winter weeds.
March 15th Preemergent and a broad leaf herbicide killer as needed. No round up because you will be getting some green up in your turf.
May 1st Fertilize a slow release high nitrogen 40-0-0 or 46-0-0
July 1st Fertilize a slow release 32 -0-0 or 28-0-0 with 5 or 10% FE
September 15th Fertilizer a winterizer 5-0-20
October 15th Preemergent and a broad leaf herbicide as needed