QuestionsHow to growTrees and ShrubsWeedsTree stump killer 0 Vote Up Vote Down Harriet Browne asked 13 years ago Which is better for killing tree stumps, SBK or Roundup? Or it there anything else? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Both are effective. Roundup more environmentally sutiable.