Centipede lawn help needed!

step one - rent a sod cutter and remove all the centipede

step two - add sand and fine grade

step three - plant zoysia

step four - have a beer on your new zoysia lawn

All kidding aside, Centipede is hard to mitigate weeds I have found. Some people I know used this and it worked great for them.

Sunday Lawn Program

Sethoxydim
2-4D
Atrazine
Pre-emergant NOW
0 to low Nitrogen fertilizer for winter
Talstar insecticide

Pre-emergant in late winter/early spring
Same hebicides in spring
Regular Nitrogen fertilizer in spring
Talstar again

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Sethoxydim

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Sounds like a crazy name but it can be found at hardware stores under the name Hi-Yield grass killer. Kills most everything but centipede.

No fertilizer on centipede.the remainder of the year.

Apply Dimension (granular) or Prodiamine (granular or spray) pre-emergent ASAP as winter weed seeds are about germinate.

If entire lawn is weed infested spray it now with MSM Turf, or Celsius or Atrazine+Weed-Free-Zone combo. Follow up with another spray in a few weeks as needed.

Cut centipede at 1 1/2 to 2 inches height.

By early/mid-Feb, next year apply pre-emergent again, and spray post-emergents weeds with the same herbicides recommended above but not during the green-up phase as the lawn transitions from dormancy to active growth.

Early April apply lawn fertlilzer at 1/2 lb N per 1000 sq ft with a second application at the same rate in June.

Spray weeds in summer as needed with either MSM Turf or Celsius, but not atrazine or weed-free-zone.

If your lawn is compacted, has a lot of thatch consider aerating it next May or so when the grass is actively growing.

Between now and next spring pull some soil samples from the lawn for analysis by the LSU AgCenter. - for baseline info and to check for any nutrient deficiency issues that might need to be addressed.

Lastly patience and persistence - it takes awhile to turn things around.

Can I put down sethoxydim now and then dimension or prodiamine the next day. Which is recommended of the two?

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Can I put down sethoxydim now and then dimension or prodiamine the next day. Which is recommended of the two?

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Yes you can. Dimension or Prodiamine - both are good. Prodiamine is a little cheaper than Dimension, comparing granular to granular. The spray version of Prodiamine is a good bit cheaper. Honestly I would put down the one you can get your hands on quickly - really need to get it out ASAP.

What are you wanting to kill with sethoxydim?

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Crowfoot grass i want to kill. I already sprayed atrazine and weed free zone for some doveweed

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OK - sethoxydim is good for grassy weeds.

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What is the produamine spray you recommend and do you recommend anywhere in the area or Northshore to buy the granular or spray. They don't have prodiamine at site one or keeling in Covington. If I put the granular down now would it was away with all the rain

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Well I was going to recommend Site One in Mandeville. I ordered my spray Prodiamine on-line from here LINK. Using this spray version the cost per treatment is about $0.35/1000 sq ft ( if my math is correct) - if you have an average size residential lawn that bottle likely has about a 4 year supply. Using Site One’s price for granular Prodiamine (Stonewall) price is about $2/1000 sq ft of lawn, the price is in the same ball park for granular dimension but a bit higher.

Independent retail garden centers in BR carry this granular Dimension - I used it for a few years with excellent results, only switched to Site One LESCO products because of cheaper pricing.
LINK you should be able to find it in your area at garden centers, hardware stores, or feed&seed stores.

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Can I wait until after rain to put stonewall or dimension down or do it tomorrow before rain in a granular

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I’d apply it before the rain. Label directions for both products state to water it in with at least 1/2 inch of water within 2 weeks of application - many winter weed seeds will be germinating within 2 weeks. Water will transport the herbicide onto and into the surface soil where weed seeds reside. Let the rain water it in for you.

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So no concern regarding the monsoon we are about to get? At what point should one worry about washout?

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Well I think the odds are in your favor of applying prior to the forecasted heavy rain than not. There is at least one university article written on this and though it is not a definitive it provides useful info LINK.to help make that decision.

South LA soils are generally high in clay and organic matter which favor pre-emergent binding affinity with soil, plus Prodiamine shows high affinity for soil binding, simazine/atrazine the least affinity, and dithiopyr (Dimension) somewhere in the middle.

It is your call. If I had a sandy soil, with little organic matter, lots of non-vegetated areas, steep slopes and was applying simazine I’d might not apply prior to heavy rains. If I’m on the opposite end of that spectrum I’m inclined to apply.

I applied my pre-emergent 2 weeks ago - I have no plans to re-apply if I get a monsoon rain. But if you want to wait a couple days then do so - my main concern is soil temperatures are very close to many winter weed seeds germinating. I would not delay application much longer, and when you apply remember to water it in ASAP with at least a 1/2 inch of water (per label instructions).