QuestionsHow to growFlowersBorder Perennial Flowershogweed -v-cow parsley 0 Vote Up Vote Down Daisy Fields asked 14 years ago Setting up a small wildflower patch in my city garden….thought it was pink cow parsley but might be pink hogweed. Very pretty…should I encourage it in my wildflower garden or get rid of ? How can I be sure it is hogweed ? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Hogweed has dull white flowers, not pink. But it is giant hogweed in any case that can be a problem and it is usually close on two metres tall.