These things are nasty.
After a 1-hour weeding excursion earlier in the summer under 93 degree heat, they just pop right back up again a week (or less) later. Now there's about 30 or so thistle sprouts in the side yard.
Is there a better, preferably (but not necessarily) organic way to get rid of them? Or will I have to wait 'til next spring to contain the invasion?