re: Fall Pre-Emergent - What and When?

You can check your labels but some good basics are:

Spray them when you see them. Don’t let them grow or they will get harder to kill.

Don’t spray if it looks like it will rain that day.

Wait 2 days before and after you spray to cut.

They make granular and liquid preemergent. I’ve always used granular just for ease of use.

I’d recommend getting a decent spreader (real tires not little plastic ones unless you have a small yard) and a good backpack sprayer.

Thank y'all! Time to get after it.

Celsius will work on buttonweed and doveweed. I’d use that now. Specticle/simazine in the next 2-3 weeks. You can use trimec or atrazine for dicondra in the spring.

Don’t put them out together unless you mean you don’t have enough specticle to do the whole property and you will finish with simazine. Pre ems do need to be watered in so definitely take that into consideration.

My soil is still a little too warm for me to put down a pre em. My 5 day average was 80 degrees. Poa germinates at 70.

You or Crawdude have any experience with Blindside? Same price as Celsius on domyown and looks like it is essentially Sedgehammer/Celsius/MSM combined into one product. Claims to target sedge, doveweed, buttonweed, and dollarweed among many others.

Q&A’s on domyown are telling people they can apply when temps are above 80 but to do so early in the day - seems similar to Celsius rec’s.

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You are going need the Celsius for the Doveweed and it will also control VBW. A 18 oz bottle is going to be $200 but that bottle will last 5 years or so.

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Correction - the Celsius at Site One is $115 not $200, I must have confused it with something else. Again, you’ll easily get 5 years or out of a bottle for a standard size residential lawn so the overall cost is no higher on an annual basis than less effective herbicides you’ll buy at the box store or retail garden centers..

The Specticle Flo pre-emergent mentioned by ronk is $280 for an 18 oz bottle at Site One - 3 or 4 years from that bottle when applied either 2 or 3 times a year for a common size residential lawn - say 10,000 sq ft. Specticle Flo works well for controlling Doveweed which from the photos you have a good bit in your lawn. I use it plus other pre-emergents.

Doveweed is annual summer weed whose seeds germinate in April/May so you could wait until next spring to buy it and apply another pre-emergent herbicide such as Dimension or Prodiamine in the next couple weeks for annual winter weeds. Site One sells Prodiamine as “Stonewall” in granular form, and Dimension (dithopyr) as Dimension in granular form. They also sell spray versions which are cheaper to apply on a 1000 sq ft basis.

I do highly recommend using pre-emergent herbicides to significantly reduce the need to continually spray post emergent herbicides.

The few dead spots in your lawn might be from low spots that hold water after heavy rains. If that’s the case you can fill isolated low spots with mason sand and grass will grow through it.

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You or Crawdude have any experience with Blindside? Same price as Celsius on domyown and looks like it is essentially Sedgehammer/Celsius/MSM combined into one product. Claims to target sedge, doveweed, buttonweed, and dollarweed among many others.

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I don’t have any experience with it but it is a combo of MSM and a decent Sedge herbicide (not Sedgehammer), so it certainly is going to do a good job on many broadleaf weeds and sedges. It’s efficacy on Doveweed compared to Celsius - I’ve no idea. The possible temperature restriction for summer use compared to Celsius is a good point, but again I don’t know the answer to that either.