I regret not using tenacity more and more. I did my lawn reno in September and so far so good. All the grass came in great despite some minor downpours. I do have some spots that I'll need to throw some seed down on in February.

HOWEVER, I have found some weeds that are very prevalent despite a number of hits with WBG Max in the summer and roundup twice two weeks before the reno.

This one can be found EVERYWHERE. Front yard, back yard.... planters?! For the most part its localized and in bunches, but there are smatterings of it nearly everywhere.




This one is a holdout from the spring




Ideas? Should I hit em with some tenacity or something? My new grass is ~8 weeks old at this point and we'll likely have moderate weather in Atlanta for another month or so.

Your first two pictures looks like chickweed to me. I got a lot of that in my renovation too. Don't know about the other weed. I was able to kill/control the chickweed with WBG max but where I sprayed it, it definitely hurt the surrounding young grass blades and they have yet to recover (month later) in terms of color and health to areas that were not sprayed. Like you I regret not using the tenacity. Just didn't think I was gonna get much weeds since my old lawn was dead for more than a month and I was killing everything that was coming up with the roundup. Big mistake. I'm using it now to kill the poa annua and after two applications it seems like it's doing the job. Gonna hit it one more time and that should do it. This was my first ever renovation...lesson learned.

yeah i'm a little nervous to hit my new grass with any WBG at this point. It looks good, but I dont know that its ready.

As for chickweed, I thought chickweed was more rhizomous (sp?). These are singular, very stringy, and almost elastic feeling? Oddest thing for me was that a planter near my front door (above the yard), is chock full of it. I could grab a handfull, pull and it comes up roots and all, by the bunches.

Looks like chickweed in the first two pics and wild geranium in the third pic. I also have the weed there are a few of in the last pic - the ones with leaves that look sort of like little lily pads. Damn things are there in the spring when the snow melts. I can't remember the name, but I'll track it down and write back. They pull really easily.

Concur with chickweed and geranium.
Are the little "Lilly pads" in the last picture wild violets?

Great... chickweed. Best options? Recommendations?

I would like to leave the yard until the spring, but we generally have pretty mild winters so I dont like the idea of the weeds getting a firm hold on the yard in the mean time. Especially since I'd like to throw down a little more seed in the early spring.

I love Tricloypr, cleans up the lawn very well. Get a bottle of Poison Ivy and Brush killer, or Clover and Chickweed killer (same stuff, different lable/rate). Add a $10 sprayer, a touch of Dawn dishwashing liquid and go to town. Grass should be fine at this point, 2 weeks from now the weeds will vanish.

crewdawg wrote:Great... chickweed. Best options? Recommendations?

I would like to leave the yard until the spring, but we generally have pretty mild winters so I dont like the idea of the weeds getting a firm hold on the yard in the mean time. Especially since I'd like to throw down a little more seed in the early spring.

I have used the Weed B Gon Chickweed, Clover and Oxalis Killer successfully. It can take a while to work and several applications (2 or even 3 apps, 10-14 days apart). I think you will get much better results if the weeds are still actively growing... not sure how lively the weeds are now down there?

Hit the lawn with Tenacity at the beginning of January and again two weeks later. I did forget to include a surfactant, but the chickweed is all gone in the front yard (or clearly dying). Some of the Geranium leaves show signs of stress... but for the most part, it looks to be doing okay. I dont see it listed on the label... am I going to have to hit the lawn with CCO as well? Or will a third app of Tenacity WITH a surfactant do the trick?

crewdawg wrote: am I going to have to hit the lawn with CCO as well? Or will a third app of Tenacity WITH a surfactant do the trick?

I think you could wait a little and see what happens with the tenacity. I sprayed some late Oct. and I still have some blades of white, it just seems to be really slow. I'm pretty sure that it (tenacity) works better with warmer weather; and giving the temps of today I'm pretty sure spring will be here early.

I'm not sure that I think that the connection between temperature and Tenacity effectiveness is a good connection. I did a fair amount of research last year after noticing that Tenacity didn't work as well in shaded areas, and found good data that Tenacity blocks an enzyme, which in turn allows sunlight to break down Chlorophyll. Hence the white. No matter what the temperature is in January, the angle (and therefore the strength) of the sunlight doesn't change. The sun is low in the sky in January all the time. Less sunlight, less effectiveness.

Thanks for sharing that information Andy! So we are entering "solar spring"... length of daylight in early February is the same early November (Feb 2 is about the same as Nov 8 for me)... Tenacity effectiveness should improve!

Picture #3 looks to me like mugwort.
I've been fighting it all last year myself.

xapabwa wrote:Looks like chickweed in the first two pics and wild geranium in the third pic. I also have the weed there are a few of in the last pic - the ones with leaves that look sort of like little lily pads. Damn things are there in the spring when the snow melts. I can't remember the name, but I'll track it down and write back. They pull really easily.

I had originally thought that the weed with the lilypad or kidney shaped leaves was hairy bittercress, but It looks more like dicondra, perhaps Dichondra carolinensis. Not sure what will work on it, but like oxalis may need something other than ordinary WBG.