Not really an ideal choice for winter. But what are you targeting?

Blanket spraying or spot spraying?

I assume you're dealing with St. Aug or Centipede for sulfentrazone to even be an option for winter weed control. Grass type?

I do like adding carfentrazone to my tank mixes in cool weather.

 

75% fescue, 25% bermuda. Blanket spraying. Love carefentrazone as well

 

There is no way I'd be applying sulfentrazone in winter when treating Fescue or Bermuda. So many more cost effective options.

 

It cost me less than 3 way. My question is about how well it works this time of year.

 

What are your temps, weeds, and what rate of sulfentrazone?

Any ester formulated three-way would be far more effective than sulfentrazone this time of year.

I can only assume you are illegally using an AG version if it costs less than a three-way.

 

Sulfentrazone works great in cooler weather in my experience, especially when mixed with a 24d or triclopyr ester 3 way.

I don't think it's labeled for dormant bermuda though.

 

Sulfentrazone by itself below 3 way cost isn't going to do much to broad weeds. I'd use it as a kicker with 3 way. Or try Momentum 4-score from lesco, around .5/M to run.

 

Sulfentrazone works pretty good with temps in the 50s when most other herbicides really drop off in efficacy below 60 (that includes 24D). If you can get it cheaply it's a good option at 5oz/acre but I would have something else in the mix to help out. I have all warm season turf and have been using MSM .4 oz plus Sulfentrazone 5oz plus Coastal 60oz on all southern turf types and it looks very good. Sulfentrazone will be getting significantly cheaper as there are several new generic versions entering the market. Carfentrazone has no generic competitors so dont expect lower pricing anytime soon.

 

Early on I like to spike my 3 ways with carfentrazone. Sulfentrazone would be good in the early summer through about Sept to get some sedge knockdown. I’m cool season turf in Jersey.