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Cold weather weed spray

13K views 9 replies 9 participants last post by  twomancrew  
#1 ·
Can you spray weeds when it cold in the fall? If so, will the treatment be effective?
I applied five different weed products to dandelions on November 12, 2013. It was 23 in the morning and the temp had risen to 34 at the time of treatment at 2 pm. Products applied were: Speedzone, T-Zone, a 3-way, Surge, and Quicksilver.

Heavy snow covered the weeds most of winter. On April 28, 2014, Quicksilver and Surge were not fully effective.

Speedzone, T-Zone and a generic 3-way were similar--all scoring between good and excellent in weed control effectiveness.

Evidently, dandelions, at least, can be sprayed even late in the fall, after more than one frost event.
 
#8 ·
Real late season I sprayed some ground ivy that had been real troublesome in two client's yard. I used Momemtum FX-2 with a hand sprayer. When I looked at the yard this Spring I didn't see any of the ground ivy, but will check when it gets a little warmer to see if it is truly gone.
 
#9 ·
After a couple frosts the plant really starts storing carbs up for winter. Thus the uptake goes right down throughout the plant. Timing is critical as you want to get it on early enough so the grass can fill in the voids after you kill the weeds. Literally can turn spring into spot spray apps rather than blanket. It really works!

John