Follow up! Do you think this stuff would work? Or do I need something like Crossbow or Brushtox which has a much higher concentration of Triclopyr?

https://www.acehardware.com/departments/lawn-and-garden/lawn-care/weed-and-vegetation-killers/7226657

Also, can I do cut stumps and painting method anytime or do I need to wait for things to start blooming?

Crossbow - https://www.amazon.com/dp/B00D0JHB5K/ref=cm_sw_r_cp_apa_fabc_7EDFP9A45JZ74BXT3ECM

Same company as Crossbow, different Triclopyr formulation - https://www.amazon.com/dp/B00534N9TC/ref=cm_sw_r_cp_apa_fabc_BVFS1VXW4N09T601K948

Brushtox - https://www.amazon.com/dp/B01BOZ5VPI/ref=cm_sw_r_cp_apa_fabc_XYA7733JQQ0ZS69EG93T