QuestionsHow to growTrees and ShrubsWeedsIvy 0 Vote Up Vote Down Jackie Walsh asked 14 years ago How do you kill ivy? I have tried Round up but with no success. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Roundup only weakens but does not kill ivy. Use Brushwood killer with some detergent to help stick to the leaves.