How To Kill Daylilies
How to Kill Daylilies. The daylily is a hardy perennial plant with an unstoppable tuberous root called a rhizome. Though many gardeners relish the beautiful orange and yellow blooms of the daylily, the plant can turn into a wild nuisance and spread into unwanted areas. Digging up a patch of wild daylilies---or ditch lilies---is back breaking work and may not be enough to kill them completely. Any segment of daylily root left behind can spawn new growth. Killing unwanted daylilies takes patience and a time, but it can be accomplished.
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