Could be overwatering.

Watering: Deep and infrequent is the mantra for watering. This is for all turf grass all over the place. Deep means 1 inch all at one time. Put some cat food or tuna cans around the yard, and time how long it takes your sprinkler(s) to fill all the cans. Memorize that time. That will be the time you water from now on. My hose, sprinkler and water pressure takes 8 full hours to fill the cans. Your time will likely be less. I like gentle watering. As for watering frequency, that depends on the daytime air temperature. With temps in the 90s, deep water once per week. With temps in the 80s, deep water once every 2 weeks. With temps in the 70s, deep water once every 3 weeks. With temps below 70, deep water once a month. Note that you have to keep up with quickly changing temps in the spring and fall. This deep and infrequent schedule works in Phoenix and in Vermont, so it should work for you. The reason for deep and infrequent is to grow deeper, more drought resistant roots and to allow the soil to dry completely at the surface for several days before watering again. If it rains, reset your calendar to account for the rainfall.

What part of the country are you in? It's only May 8- the fertilizer may take more time to break down and be absorbed by the lawn.

Has your area had rain, or are you irrigating it enough? I guess I'm saying, easy solutions first.

Could need an iron or sulfur boost as well if all it's received is nitrogen lately. That'll get the green without pushing too much top growth

Thanks, all. I live in very northern Alabama. We've been getting a pretty good amount of rain. I check the soil and the rainfall totals, and water accordingly. I have an in-ground sprinkler system with 3-4 heads per zone, and I water each zone for an hour. That's worked well in the last 7 years I've been here.

I've been putting down Lesco 24-2-11 (24% nitrogen, 2% phosphate, 11% potash, 6% iron, 1% manganese). I've had good success with this.

I just mowed, and noticed that about half of the lawn is still brown, which makes the whole lawn look pale. I'm wondering about fungus. I've had that problem before, but only in spots, and with very defined areas.

Fungus is not likely, the Bermuda grows too fast. Have you scalped yet this year? Is it thatchy or can you see bare ground between stolons?

I had fungus two years in a row. Pretty expensive to treat.

The grass isn't thatchy, I can see the individual blades, and the ground. I bag all of my clippings.

I forgot. No, I didn' t scalp this year. I haven't in a few years..

Check out your stem to leaf ratio then. Pull a stolon & if its all Brown stem with just a green leaf on top, a scalping may be in order. If you're not sure, post it up & I'll compare it to one of mine

Here's a representative sample from the front yard

Ratio looks good, but you're right about signs of fungus--Thats very unusual on Bermuda, even during wet weather, but there they are. I wish I had better news for you, but at least there are quality fungicides out there these days. Are you near a golf course?

No, I'm not near a course, but I've had fungus problems two or three of the seven years I've lived here.

I have half a bag of Heritage G left from a couple of years ago. It's been in my qarage, which is pretty warm in the summer.

I have an in-ground sprinkler system with 3-4 heads per zone, and I
water each zone for an hour. That's worked well in the last 7 years I've
been here.

...except for the 2 years in a row that I got a fungus when 99% of bermuda owners never get fungus. Seriously, deep and infrequent, especially for bermuda.

I was just doing some googling & it turns out Alabama gets some unusual fungus issues due to wind currents from the sub tropics.. who knew