There are some people out there that are having success with Tenacity. Ethofumasate (Prograss) is a selective herbicide that targets poa annua. Velocity is another one, but that one might be restricted to professionals only, and it can cause temporary harm to KBG. A good anti-poa annua strategy involves regular preemergent applications, especially in late summer, and late winter/early spring. Controlled round-up application will obviously kill poa annua, but if you don't have a spreading grass like KBG, those areas will remain bare, but you can always plant some grass in pots to fill in the bare areas since you will have a preemergent barrier down.

It's already been dug out of a plot around a street sign. I thought it may have been the KBG I seeded in the area last year - b/c it's on the "hell strip", drainage isn't the best, and I thought some of the seed may have pooled in that area and decided to sprout early with some of the warmer weather we've had. Well, at least it dug out really easy (I'd been saving it all in a wheelbarrel). Of course, the more I think about it, the more I realize I may have planted a shade blend of FF and TTTF. I really need to keep better notes. Thanks for the confirmation. --Gags

Hi Graswhisperer, This is all new to me too this year - my pre-renovation lawn was so choked with weeds that I never even noticed it before, but now it really stands out, just begging to be killed off... Poa Annua germinates mostly in late summer/early fall, but there can be some spring germination also. So unless I read some better advice I'm planning to put the Dimension down around August 15, and then again next March, earlier than I ordinarily would for crabgrass control. This schedule screws up my planned fall aeration, and probably any spring aeration too, so I think I will just take care of the really bad spots with a manual aerator this year over the summer, here and there, whenever I think the grass can take it, and then stop a week before putting down the Dimension on Buy_25's advice. Unfortunately, there are apparently oxymoronic perennial varieties of "annual" bluegrass out there, and a pre-emergent like Dimension won't kill them. That's why Buy_25 is recommending Prograss (ethofumesate), which I gather is a post-emergent control with some pre-emergent effectiveness as well, at least if I have read that right. But apparently that can be expensive. I need to look into that further, but below is a link on a discussion from earlier this year. Good luck! What a rotten weed. As difficult as spring seedings can be, I may never seed in the fall again. Here is a link that might be useful: ethofumesate discussion

Despite what I'm being told I am pretty much giving up hope that all these seed heads are coming from my turfgrass. I've been researching poa annua a little bit more and images I see online look very much like what I have going on in my lawn. Here are a few more pictures of my lawn... Opinions? If it is poa annua (I'm convinced that it is), I can't for the life of me figure out why this is happening. My lawn was started from seed in September 2013. I didn't have any poa annua problems in 2014 (nor any of these seed heads). I mow high and I water infrequently. And the kicker is I see nothing like this in any of my neighbors lawns, none of whom take lawncare seriously...so why would it take hold in my thick, high lawn but not in theirs? Was it mixed into the seed the landscaper used but didn't take hold until now? I overseeded last Sept but I know it wasn't in that seed because I had a few bare spots I fixed and those spots are free of these seed heads. And what do I do about it? Kill everything and restart? Keep spraying Tenacity in hopes I beat it? Or, since it's an annual, will it all die this summer, then use preemergents more aggressively?