How to Kill Daylilies

11 Daylilies, or Ditch Lilies, are beautiful plants that produce a brightly colored orange flower. They are a bit of a weed in nature though, and most people opt to kill or remove them from prime landscaping areas that will be used for grass, vegetable gardens or flower gardens. These flowers are sometimes known as the "unkillable flower" because it is so hard to rid your yard of this plant. Doing so will take time and patience, but it is well worth the effort.



Things You’ll Need
  • Lawnmower or weed whacker
  • Newspapers or plastic weed barrier
  • Mulch
    1. Decide on the areas of daylilies to be killed. It is better to have a squared off patch instead of a spot here and there.
    2. Set the lawnmower to its lowest setting for yards. If your lilies are in a ditch or somewhere else where it is not logical to use a lawnmower, go to step 3.
    3. Mow over the patch of lilies that you have decided to exterminate, or weed whack them, until as much of the plant as possible is removed.
    4. Set newspapers over the freshly clipped lilies until you have an inch thick stack of newspapers, or spread out the plastic weed barrier and stake down. The idea is to let as little sunlight as possible into these areas.
    5. Wet the newspaper to prevent it from flying away.
    6. Spread a thick layer of mulch over the newspaper or weed barrier.
    7. Replace mulch as needed over the course of a year. If any lilies sprout up after this, spot treat with an herbicide like RoundUp.

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