How far into the fall (according to the temperature) can you spray leafy spurge and have good results?
The best timing varies by herbicide. Plateau should be applied in mid-September for best results as control may drop 50 percent or more if Plateau is applied in August or October. Tordon plus 2,4-D has a wider application window and can be applied from late-August to early September. Paramount has provided good leafy spurge control even when applied in late October following several hard frosts. Leaf color can vary from green to yellow and red. The key is to make sure the leafy spurge leaves are still firmly attached to the stem so the herbicide can be translocated to the roots. If leaf drop has begun, it is best to wait until the following growing season before applying herbicides for leafy spurge control.
