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Too late to put down preemergent? If not recommend a good one for St. Augustine.

Posted on 2/16/24 at 10:53 am
Posted by thadcastle
Member since Dec 2019
2607 posts
Posted on 2/16/24 at 10:53 am
Also why are some spots in my yard doing this and how to I fix it? We've had quite a bit of rain.

This post was edited on 2/16/24 at 10:55 am
Posted by poochie
Houma, la
Member since Apr 2007
6168 posts
Posted on 2/16/24 at 11:03 am to
Posted by poochie
Houma, la
Member since Apr 2007
6168 posts
Posted on 2/16/24 at 11:04 am to
quote:

too late to put down preemergent? If not recommend a good one for St. Augustine.


not too late, prodiamine is a good one, it's generic Barricade (much cheaper)
Posted by Trout Bandit
Baton Rouge, LA
Member since Dec 2012
13181 posts
Posted on 2/16/24 at 11:05 am to
I've had pretty good results with Dimension on my Zoysia but ronk and CrawDude might know of a better option.
Posted by CrawDude
Baton Rouge
Member since Apr 2019
5263 posts
Posted on 2/16/24 at 11:18 am to
Not too late, as mentioned Prodiamine or Dimension; cracks - common in unvegetated dry, heavy clay soils - clay physics - but we’ve had rain so I’m not sure.

If you’ve had an issue with crabgrass in the past, Dimension has post-emergent activity on seedling crabgrass that Prodiamine doesn’t provide so you can take that into consideration in your choice. If you are new to this, remember the pre-emergent needs to be watered in by Mother Nature or you to be activated - that info will be on the product label.
Posted by TDsngumbo
Alpha Silverfox
Member since Oct 2011
41479 posts
Posted on 2/16/24 at 9:18 pm to
My yard is already full of weeds. Are you saying it’s not too late for preemergent? I’d imagine it’s too late for me since weeds are already all over. I really need to get my yard under control this year.
Posted by poochie
Houma, la
Member since Apr 2007
6168 posts
Posted on 2/16/24 at 10:11 pm to
It will prevent new weeds from sprouting but you also need to nuke the existing weeds now.

Eta: the current weeds are winter weeds, the heat will kill then. You’re preventing spring/summer weeds with PE.
This post was edited on 2/16/24 at 10:13 pm
Posted by CrawDude
Baton Rouge
Member since Apr 2019
5263 posts
Posted on 2/17/24 at 12:21 am to
quote:

My yard is already full of weeds. Are you saying it’s not too late for preemergent? I’d imagine it’s too late for me since weeds are already all over. I really need to get my yard under control this year.

As poochie stated, not all weed seeds germinate simultaneously, applying pre-emergent now will help to control many, not all, weeds whose seeds germinate at soil temperatures of 60, 65, 70F….over the next few months. Control the weeds you have now with post-emergent herbicide.
Posted by TDsngumbo
Alpha Silverfox
Member since Oct 2011
41479 posts
Posted on 2/17/24 at 8:11 am to
I also have giant bare spots in my yard due to dirt work last June. I put down grass seed and watered it well for the first few days but then slacked off. They germinated and the drought hit, killing it all. I need to get that taken care of soon. Will the preemergent kill whatever grass I plant in those spots?
Posted by poochie
Houma, la
Member since Apr 2007
6168 posts
Posted on 2/17/24 at 9:40 am to
It will prevent new seeds from emerging so don’t spray there.

ETA: you should maybe look at this as a 2 year process. Focus this year on getting good grass growing. Use post emergents to keep the weeds in check and get the good stuff growing then really hone in once you have that working.
This post was edited on 2/17/24 at 10:05 am
Posted by thadcastle
Member since Dec 2019
2607 posts
Posted on 2/19/24 at 5:13 pm to
quote:

Dimension

Where do I find dimension for purchase?
Posted by Trout Bandit
Baton Rouge, LA
Member since Dec 2012
13181 posts
Posted on 2/19/24 at 8:34 pm to
Site One has it. So does Cleggs.
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