Red Waxflowers (Divided)
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Red Hot Poker Lily - Kniphofia with dying stems - What's the Cause
Ask the Expert: Why is my Lily (red hot) dying on the stems only?
The leaves on this plant look just fine, but, the stems are turning brown then just dropping down and are dead in the stem only..... What am I doing wrong?
Your Kniphofia (Ret Hot Poker) probably has Rhizoctonia (a soil borne fungus) or another kind of fungus. The spread of Rhizoctonia and other fungus is caused by poor watering practices. Water your Kniphofia in the morning if possible and you may need to cut back the water. You want to keep your plants moist but not soggy.
Remove all parts of the plant that are infected. You can trim the stems completely down to the ground. Between each cut, dip your pruner in a solution of bleach water to prevent the spread of the disease. Solution should be 1part bleach to 3 parts water. If the plants are in a container remove all the soil and re-pot in new soil after you have clean the container with bleach water.
You will need to treat your Kniphofia with a fungicide. I recommend a systemic fungicide with the active ingredient propiconazole. Fertilome liquid systemic fungicide is one I often use, but there are other brands that contain the same chemical. Your local garden center should carry a fungicide that will work for you.