when is the correct time in the spring and in the fall to put down a pre emergent? I live in N.R Hills 76180 area

i used to put simizine down every October / February...i now have Zoysia grass...don't need pre emergent with it

I'm going with .37% active ingredient Prodiamine late February/Early March depending on temps. Then Dimension late spring/early summer. And more Prodiamine later this season. I'll try to link a google drive pdf here that explains the time and differences of the P&D. If the link doesn't work PM me and I'll email it to you.

https://drive.google.com/file/d/1gZ...?mc_cid=fef1bcaeaf&mc_eid=5f3620f6ae

My lawn care company put it down Friday, I think they do two treatments in the winter time, they did one last month as well.

what about Scotts Bonus S ?

That's a post emergent. You would apply that once the grass and weeds are growing to kill active growing weeds. Pre emergent blocks the weed seeds from germinating/growing in the first place. Besides using a chemical pre emergent I am pretty organic other than that, So I don't keep real up to date on the latest chemical fertilizers and weed killers post emergence. But pretty much every well known lawn guy does not recommend weed and feeds. Including Neil Sperry. They recommend separate treatments.

I put pre emergent down every month starting in October,, never had any issues. Stop once spring areives.

When I lived in Irving I had St Augustine, it was specific for St Augustine, it was outstanding to use.

I kept my yard looking like a well manicured putting green, I moved to Frisco with some type of Bermuda or Bermuda mixture and the house had been sitting empty for almost one year, the back yard grass was as tall as the wooden fence, I tried my best to weed and feed and finally gave up and hired a lawn service, now my grass is back to looking like a champ

yeah
thats the problem i have Bermuda St. Augustine mix

from the man himself

https://neilsperry.com/2013/01/what-is-the-right-time-for-preemergents/

yes he is
he needs to update his temperature data though

I got this schedule here on TFF a few years back and it works well for me here in Centex.

Write these dates down:

Feb 15 - pre-emergent
April 15- fertilize
May 15- pre-emergent
June 15- fertilize
July 1- treat for grubs
Sept 15- pre-emergent
Oct 15- fertilize

Do the prescribed application on or a week before the dates listed. I also have St. Augustine and since following this regiment, it is as thick as carpet. I can't take credit for the dates, it is from Neil Skerry. Scotts Halts Crab Grass and Grassy Weed Preventer is the pre-emergent I use and Bonus S is the fertilizer I use on my St. Augustine. Use GrubX for treating grubs.

nice

I have pre emerging weeds already coming out.