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Late winter pre-emergent application:

Posted on 1/21/21 at 2:21 pm
Posted by OysterPoBoy
City of St. George
Member since Jul 2013
34989 posts
Posted on 1/21/21 at 2:21 pm
I believe the general consensus was February on this? Do warm temperatures now change anything with that?

Also, I put down Hi Yield with Dimension in the fall and have had really good results so far. Only a few small spots of clover have popped up and I already nuked those. Should I do the same product this go round or should I change it up?
Posted by ronk
Member since Jan 2015
6172 posts
Posted on 1/21/21 at 2:24 pm to
Use prodiamine this time around. If you plan on double apping it then you can do one in January and one 6 weeks later.
Posted by meeple
Carcassonne
Member since May 2011
9341 posts
Posted on 1/21/21 at 2:43 pm to
I did a split application last year, first when the 5-day avg soil temp was 55 degrees and the second at 70 degrees.
Posted by Coon
La 56 Southbound
Member since Feb 2005
18492 posts
Posted on 1/21/21 at 6:51 pm to
My yard is 8 month old Bermuda. If I put pre-emergent down, would that prevent me from applying more Bermuda seeds in the spring to fill holes?
Posted by tilco
Spanish Fort, AL
Member since Nov 2013
13470 posts
Posted on 1/21/21 at 7:04 pm to
quote:

Use prodiamine this time around. If you plan on double apping it then you can do one in January and one 6 weeks later.


I did dimension in the fall. I have enough left over for another app here soon. Can I do that no and then do prodiamine in may or June?
Posted by Drunken Crawfish
Member since Apr 2017
3822 posts
Posted on 1/21/21 at 8:36 pm to
Yes. I would just wait until the spring then use herbicide on the weeds after the grass is back growing
Posted by ronk
Member since Jan 2015
6172 posts
Posted on 1/22/21 at 6:31 am to
Don't put pre em down if you plan to over seed. Some of the seed will take and some won't.
Posted by ronk
Member since Jan 2015
6172 posts
Posted on 1/22/21 at 6:34 am to
You can put down the dimension. I wouldn't wait until May or June to do an app of prodiamine though. I would do that about 6 weeks after the dimension.
Posted by TheWiz
Third World, LA
Member since Aug 2007
11672 posts
Posted on 1/22/21 at 8:09 am to
I cannot remember if I put pre-em down this fall/winter or not. Is it suggested to put down in the next week or two and then six weeks from then?

I wanted to start with this:

Crabgrass Control Plus 0 - 0 - 7 with 0.37% Prodiamine Herbicide


and follow up with this:


Is that ok to do? My weeds aren't too out of control. I'd call it a 2/10 problem.
Posted by ronk
Member since Jan 2015
6172 posts
Posted on 1/22/21 at 8:50 am to
Both are pre em's so don't do two apps of prodiamine and then another app of dimension. Do one and one. It's important to rotate herbicides, pesticides, and fungicides so prevent pest resistance.

If you can't remember if you did one do you remember when you would have done it. Just looking for a time frame. If you think you could have done one in October then you can do it in the next few weeks. If you possibly did it mid December then I would wait a little longer.
Posted by TheWiz
Third World, LA
Member since Aug 2007
11672 posts
Posted on 1/22/21 at 8:57 am to
Yeah, that's what I meant to say. Prodiamine now or soon and then follow up in six'ish weeks with Dimension.

I cannot remember at all. I think I forgot in the fall, so probably last application was February of 2020.
Posted by ronk
Member since Jan 2015
6172 posts
Posted on 1/22/21 at 9:01 am to
You should have no issues proceeding as planned. Early February and mid March pre em apps should do the trick.
Posted by TheWiz
Third World, LA
Member since Aug 2007
11672 posts
Posted on 1/22/21 at 9:04 am to
Right on. Thanks. I need to rotate my fungicide too. I had some large brown patch issues in my Zoysia right before it wend dormant. Hoping it comes back healthy.

Wait on Fungicides for active growing?
Posted by OysterPoBoy
City of St. George
Member since Jul 2013
34989 posts
Posted on 1/22/21 at 9:05 am to
If I did dimension in October and prodiamine now would I still do another in spring?
Posted by tilco
Spanish Fort, AL
Member since Nov 2013
13470 posts
Posted on 1/23/21 at 6:12 am to
quote:

You can put down the dimension. I wouldn't wait until May or June to do an app of prodiamine though. I would do that about 6 weeks after the dimension.


Posted by ronk
Member since Jan 2015
6172 posts
Posted on 1/23/21 at 8:53 am to
Propiconizole and azoxystrobin
Posted by ronk
Member since Jan 2015
6172 posts
Posted on 1/23/21 at 8:54 am to
Yes. I would.
Posted by RedBeardBaw
Member since Feb 2017
370 posts
Posted on 1/24/21 at 4:17 pm to
Any pros/cons on putting down atrazine before the green up instead of dimension? I put dimension down in October and will be ready for next months application of whatever is best.

Ps. I have a mix of Bermuda and st Augustine but planning on putting pre-m before bermuda greens up.
This post was edited on 1/24/21 at 4:18 pm
Posted by ronk
Member since Jan 2015
6172 posts
Posted on 1/24/21 at 8:46 pm to
It’s a good pre/post. You don’t get pre and post from a lot of herbicides. I like to use it more as a post em for winter grasses (poa and rescue grass).

Like you said...make sure that bermuda isn’t greened up. You’ll smoke it!!
Posted by reauxl tigers
Tiger Woods Fan
Member since Aug 2014
7933 posts
Posted on 1/25/21 at 10:57 am to
Should I be expecting the weather to get colder again or should I go ahead and apply since the averages are above 55*? Also want to aerate this summer, will that mess up the pre em barrier! Should I apply again after aeration?
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