The top one looks like annual rye and the bottom looks like bermuda.

Where do you live? That may help.

I live in Southern California

Do you have them in your turf or in your flower beds, or both?

Both can be dealt with but it depends on what else you want. Bermuda can even be a very nice lawn if you want to take the time to do it right.

What kind of grass would you like to have?

Normally I ask where you live in SoCal because there are so many different conditions there. Are you near the coast, in the mountains, desert, etc.? Naming your town usually works best for that region. We won't be visiting you, just helps to know.

its just in my lawn, I have st. augustine grass. I tried applying weed B gone on dandelions and it also killed the grass so I'm trying to be specific here.

I am right by the beach, in Oxnard, CA. The temperature here is always around 70 degrees year round. Just a little colder in the winter and little hotter in the summer.

So are you sure its Bermuda Grass and Annual Rye?

Thanks for helping me out, by the way... :)

top looks like poa annua (aka annual bluegrass) to me.

Is there anyway I can confirm its poa annua? It looks just like it but could be something different for all I know. I'm pretty sure the other one is Bermuda grass right?

The best way to get a definite ID is to take a sample of it (including some roots) to an extension office.

If you look up annual rye anywhere, you will see your picture. That is classic annual rye.

I know the Oxnard area as a cool place on the road from LA to Santa Barbara. There used to be flower farms there. Is Pt Mugu there? I visited a Naval base that got a project of mine way back when. Anyway...

The annual rye should be dying out any day now. You can leave it alone and it will disappear. St Augustine will choke out the bermuda as long as it NEVER dries out completely AND you mow the St Aug at the highest setting on your mower. With St Aug there is never any reason to reset the mower lower, so you can go ahead now and weld it at the highest setting. Welding it will prevent a well meaning relative or neighbor kid from resetting your mower for you to clear out all that tall grass. St Aug can be nearly perfect in terms of easy care when you do that. It also helps the color and density to fertilize it regularly. I fertilize with organic fertilizer on every federal holiday. If you want to follow that schedule with synthetic fertilizer, skip the 4th of July and wait until Labor Day.

Tall grass will also clear out the dandelions. They cannot live if their broad leaves are pushed up in the air. Tall St Aug will do that. When you reset the mower the grass will look shaggy for awhile because not all the grass grows up at the same speed. Once it all gets there, it looks really plush.

Your grass will never go dormant as long as you water it once a week (maybe less near the beach). You are probably in the zone of "late night and early morning low clouds near the coast, clearing by eleven," and here the sea breeze kicks in at 2PM every day. Do you wear a jacket every day of the year? You may not need much extra moisture at all. In fact keeping weed seeds from sprouting might be a problem with that much steady moisture. Keeping the grass tall will have a big bang for zero bucks.

Poa annua looks just like that top picture. In particular, look at the seed heads.

Here is a link that might be useful: Annual bluegrass

I agree with m1shmosh.

This isn't intended as a slight at anyone. But I think the biggest weakness on this board is correct weed identification. I don't know all the weeds. But I know Poa annua when I see it. That first one is Poa Annua.

I've no idea on the 2nd picture.

For what it is worth, one of the easiest ways to ID Annual Rye (AKA Italian Rye) is it tends to have a purplish red color at the base of the plant.

Identifying Characteristics: The auricles that occur in the collar regions distinguishes this grass from other similar weeds, as relatively few grass weeds have this feature.

Additionally, the red-tinged base of annual ryegrass helps to distinguish this weed from perennial ryegrass (Lolium perenne), which is very similar in growth habit and appearance.

This url provides more information on Annual Rye.

Don,t know what the second one is, but the first one is diffently poa annua.

i agree with the poa annua diagnosis. look at the stems of the plant and if you see a somewhat wrinkled looking appearance on parts of the stem, that will usually point me to poa annua. that lighter green color is usually a giveaway too. sticks out like a sore thumb with other grasses around it, especially on a cloudy day. can't help ya with the other one, i'm a cool season guy.

thanks for the repsonses! I believe it looks more like Poa Annua, too. Either way, it seems to by dying off with the unsually hot past two days.

So I think the only thing I need to worry about is the Bermuda Grass.

While I'm on the subject, can I apply pre-emergence in the winter/spring in st. augustine grass for poa annua for next year?

Is this poa growing in full sun or in the shade? And how much shade?

My $ .02:

Key ID feature for annual rye: Flat blades (not v-shaped) and shiny (glossy) appearence. The second photo looks warm season(ish) --I am less experienced there. Would need the grass in hand to ID it.

Looks like POA annua to me.......but what do I know. I've been trying to kill the stuff for years!

its mostly growing in the shade under trees and on the northside of our brick wall separating my front yard from the backyard in the shade. But it seems to be dying off! :)

Yeah, the real grass will not take over in there. I would be inclined to make a garden bed with plenty of mulch in the shade. Plenty means more than 3 inches deep. Loose mulch is great because if any weeds do start to grow in it, the roots are in a very weak medium and they pull right out. In your area you might have a lot of redwood bark mulch. That would be fine if it is cheap. Can you get shredded juniper or cedar? Shredded is better than bark chunks because you can get a full blanketing effect that you cannot get with chunks.