Canada, musk, scotch, bull. Today we’re discussing thistle. They are undeniably striking plants, but you don’t want them on your property. Many of them are considered noxious weeds and are extremely invasive. With some plants dropping as many as 20,000-40,000 seeds per head, infestation can happen before you know it. Learn how to give yourself the best chances for success in keeping them at bay in your area.