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Pre-Emergent Timing

Posted on 10/16/22 at 10:41 am
Posted by dr_mantis_toboggan
Member since Sep 2020
11 posts
Posted on 10/16/22 at 10:41 am
This is my first year getting into lawn care. When should I be putting down my fall pre-emergent? Planning on laying down some prodiamine. I live in the NOLA area. I know it should be as soil temps near 70. Should this just be based on the 5 day averages? Seems like these averages bounce around a bit, and it looks like we're about to get a cold front which will drop us below 70 for a few days. But then we'll be back up into the mid-70s by the end of the week. Should I just apply now? Or should I wait for 5 day average to stabilize around low 70s?

Or should I just stop overthinking and lay down some prodiamine today?
Posted by CrawDude
Baton Rouge
Member since Apr 2019
5690 posts
Posted on 10/16/22 at 10:43 am to
quote:

Or should I just stop overthinking and lay down some prodiamine today?

Yes
Posted by ronk
Member since Jan 2015
7486 posts
Posted on 10/16/22 at 10:45 am to
It’s hard to be perfect so would you rather be early or late?
Posted by Finnish
Member since Nov 2021
787 posts
Posted on 10/16/22 at 8:15 pm to
I put it down about a week ago. Figure it’s close enough.
Posted by derrick0356
new orleans
Member since Jan 2013
305 posts
Posted on 10/17/22 at 9:16 am to
I'm in the same area and I applied it last weekend.
Posted by TigerTitleHunter
Red Stick
Member since Jan 2008
507 posts
Posted on 10/17/22 at 10:05 am to
Go ahead and apply it. I did my yard last week.
Posted by Daygo85
Member since Aug 2008
3083 posts
Posted on 10/17/22 at 11:59 am to
quote:

Or should I just stop overthinking


Absolutely. I put down pre-emergent 3 to four times a year. You have to get rid of the bad stuff before the good grass will prosper. You will never do anything to kill mother nature indefinitely. Trial and error. Just remember what you did when you screw up and don't do that again.
Posted by BankLSU
You cant be any geek off the street
Member since Nov 2005
771 posts
Posted on 10/17/22 at 2:17 pm to
quote:

I put down pre-emergent 3 to four times a year.


Wow....do you use different types for every application? or the same one every time?
Posted by Daygo85
Member since Aug 2008
3083 posts
Posted on 10/18/22 at 10:25 am to
MSMA. Every time.
Posted by CrawDude
Baton Rouge
Member since Apr 2019
5690 posts
Posted on 10/18/22 at 11:07 am to
quote:

MSMA. Every time.

Just so BankLSU and others are not confused, MSMA is not a pre-emergent but a post-emergent herbicide, it is no longer labeled for use on residential lawns (meaning technically it’s a violation of federal law to use in that manner), and the herbicide will damage St Augustine and Centipede lawns, but is safe for use on Bermudagrass and Zoysia.
This post was edited on 10/18/22 at 12:41 pm
Posted by ronk
Member since Jan 2015
7486 posts
Posted on 10/18/22 at 6:53 pm to
Yeah, like Craw said. MSMA is not a pre em. Few people have Bermuda and zoysia in south La so I hope you’re doing it right.
Posted by Laugh More
Member since Jan 2022
3317 posts
Posted on 10/19/22 at 5:46 pm to
I just put new sod down about 3 weeks ago (finally able to get to my lawn after rebuilding the house from Ida)

Am I able to put down pre emerg now or should I wait due to it being newer sod?

I am completely new to lawn care, so if you can explain it to a child, that will suffice for me.
Posted by CrawDude
Baton Rouge
Member since Apr 2019
5690 posts
Posted on 10/19/22 at 6:41 pm to
quote:

Am I able to put down pre emerg now or should I wait due to it being newer sod?

Wait until next spring. The labels on pre-emergent herbicides are clear as to not use them on newly sodded or sprigged lawns.
Posted by Laugh More
Member since Jan 2022
3317 posts
Posted on 10/19/22 at 7:24 pm to
Fantastic. I’ve never used them and thus have never read the labels. Thanks for the insight.
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