Looks like some left over perennial rye from 2014- and also some annual bluegrass. If you want to a pure bermuda stand- spray 'Roundup" on everything while bermuda is still dormant, and then apply a weed preventer to halt further germination of annual bluegrass. (which will continue re-seeding itself all winter and early spring if not dealt with) 'Dimension' is a good weed preventer...... In early March, mow the bermuda short, remove clippings and fertilize. The bermuda will emerge beautiful like a new lawn.

Thanks for the information and the comment. The bottom picture grass (darker one) doesn't have any flowers on them. The second picture grass has some seed(?) on them I believe. I uploaded picture below.

I did spray some grass killer from home depot about two weeks ago, i see some grass going yellow. But I think my bermuda is not in completely dormant anymore, please see the photo below.

In this situation, should I just let it be until the weather gets better and hoping it would die out?

I used Scotts Halts Crabgrass & Grassy Weed Preventer last October and I haven't applied anything since. I was watering lawn throughout the winter.

As far as fertilizer goes, I never used any fertilizer until July or August last year, when my lawn was not looking so good. I read the "Bermuda Bible" and starting to realize that I need to use the fertilizer.

Seems like everybody waters their lawn on the watering day (eg. Wed, Fri and Sun for us). I did read that watering deeply once or twice a week is much better than watering small but many times. Maybe I will try this method this year.

For now, I have stopped watering my lawn for a few weeks now, should I start to water again?

Tom - Thanks for the information. Will it be ok to apply the Halts again if I apply them last October?

Halts has fertilizer and weed preventer. The other option is to over seed the area with rye, so that its all green, and not patches of green. You can put rye down any time during the winter for your zone. Its slower to establish compared to fall , but it can be done. You will need to mow short and remove some of that thick layer of bermuda before seeding.

..........also, if you want to go the Roundup method ......even though there is a little bit of green, its not enough to absorb the amount of chemical needed to kill all the bermuda runners and rhizomes. You may get a small amount of bermuda damage, but not enough to even worry about. If you decide to go the other route and seed, you can't use Halts, because it will prevent everything from germinating (good and bad grasses) . After the rye is established, you could use Halts later on in the spring- for crabgrass control.

Tom - I am ok having green patches here and there over the winter months. I just wanted to make sure everything I am doing will help bermuda grass. I did spray some Grass Killer from Home Depot, but seems like it is only affecting small amount of grass. Should I try different brand? Or is it ok to have different grass coming up during the winter months until the bermuda comes back in spring?

Killing grassy weeds in grass usually requires a tough love approach. You usually kill some of the surrounding grass with overspray from the grass killer. Use cardboard to shield the good grass when you spray. Bermuda is a good grass to have because it comes back so quickly.

Before you seed new bermuda, what kind of bermuda do you have? If it went in as sod, then do not seed. The two types of bermuda are completely different looking and in the way they grow. It's like humans are different from apes.

It is telling that the weeds are prominent in the shade of the house. Bermuda cannot grow in the shade and will thin out. Thin grass will get weedy. You probably picked bermuda because it does well with very little water. That's not true. It survived with very little water, but no turf grass "does well" with very little water. There are some prairie grasses that do better than turf grasses, but they require even more sunlight than bermuda does.

I would not water until I saw the bermuda break dormancy in March or April. It's dormant. The main reason to water dormant grass is to moisten the soil so the microbes can get a drink. The grass is immaterial when dormant. If you've had any rain this year and the temps are where you said, I'd leave it alone.

dchall_san_antonio - Thanks for the input. It was laid by sod when they built the house. I stopped watering completely, I think I will wait out like you are saying.

Pre emergent every few months & an annual scalping will do wonders to cut down on that annual bluegrass problem.