Things You'll Need:
- Shovel
- Systemic herbicide
- Lawn mower or weed eater
- Plastic tarp
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Step 1
Dig up the native daylilies. This option is best for limited daylily invasions. Grasp the base of the daylily's stem. Use a shovel and slide it under the plant. Pull up the shovel and stem simultaneously to uproot the plant with its rhizome intact. A rhizome is the daylily's bulb-like root. Pulling up the plant's stem but leaving behind the rhizome will result in the rhizome sending up new daylily shoots.
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Step 2
Spray the daylilies with a systemic herbicide, available at most nurseries and garden stores. This option is best for widespread daylily growth. Spray the entire patch of flowers, coating all exposed plant surfaces with the herbicide solution. For best results, spray during the summer when the flower plants are at their peak.
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Step 3
Repeat the herbicide application 20-30 days after the previous application. During this time, any dormant or aggressive daylily plants will have sent up new shoots. Spray the new growth with herbicide to eradicate all remaining daylily plants.
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Step 4
Mow down the native daylilies if you do not want to use a toxic chemical such as herbicide. Use a standard lawn mower or weed eater, and reduce the daylilies to ground level.
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Step 5
Cover the mowed area with a black plastic tarp. Weigh down the tarp with rocks or bricks. Keep the area covered for 9-12 months to starve the plants of sunlight and completely kill all vegetation in the area. Remove the tarp and replant the area with ground cover, lawn grass or flowers.
