I used Trimec Classic, its a 3-way that has 2,4-D, dicamba, and mcpp in it as ai. I started in mid feburary with my applications, my sprayer was calibrated and i thought all was going to do well. The requirements are 1.25-1.5 oz/k so i used 1.35oz. After 2 weeks, the onions were drooping and the other broadleaves were curling. Now over a month later, the dandelions are yellow and ready to seed out. They have been affected by the herbicide because they are shorter and kinda stubby. Well, the stalk for the seed head is shorter and thicker. Also, the onions seem to be coming back to life. I thought Trimec Classic was more residual than this. What's going on? Thanks for your help!!