Dig them out. Pour boiling water on them, then dig out. Spray heavily with vinegar then dig out.
Vida...l would use 1 cup vinegar..1/4 cup salt & a little dawn..shake in spray bottle. good luck!
Weeds are so sturdy and grow when nothing else will. Here are some suggestions for you.
And we use chemicals for the thick weeds that you can get from Home Depot or Amazon.
Bushy weeds are just like spindly weeds: their seeds are blown everywhere, where the seeds germinate and grow roots. If the weeds are still growing, spray it with a toxic mixture of a pint of vinegar, 1 teaspoon of Dawn, and 1/2 cup of salt. Spray the whole plant, focusing on the root ground level. One day after spraying, pull or dig up the whole plant. If the weeds are already drying out, allow 3-4 hours after spraying, then pullout the weeds. At the first sign of new green growth, spray again to prevent further germination. The spray will also kill grass and flowers, so use carefully. Jewell