How do I kill bull thistle?
Bull thistle are very hard to rid of. They require a selective herbicide. The one used in my county in Colorado is called torradon. It targets specifically thistle. You may want to call your local soil extension office. Thistles in most state are consider a highly noxious weed. The extension office can give you lots of info and in some county’s they help with the cost to eradicate. Being in your toddlers area is not too much to be concerned with , follow the directions and it will give you a time in which people and pets can return to a treated area, in general it is just a day or two. Good luck and God Bless thistle are real Boogers!