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Beach spider lily · Hymenocallis littoralis

Why is my Beach spider lily declining?

If your spider lily is wilting or declining despite good care, you might have a pest problem. The most serious concern for this plant is the narcissus bulb fly.

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pests on a plant
Photo: Jules Verne Times Two, CC BY-SA 4.0

Check these first

  1. Check the base of the plant for soft spots.
  2. Inspect the undersides of leaves for white fluff.
  3. Gently tug the plant to see if it is loose in the soil.

Likely causes

  1. Narcissus bulb fly

    Most likely

    How to tell: The plant stops growing and looks stunted, often with a soft or hollowed out bulb.

    What to do: Unfortunately, once larvae are inside the bulb, it is very difficult to save the plant. Dispose of the infested bulb and soil to prevent spread.

  2. Mealybugs

    Possible

    How to tell: Small white cottony masses appear in the leaf axils or under the leaves.

    What to do: Dab the pests with a cotton swab dipped in rubbing alcohol. For larger infestations, use insecticidal soap spray.

Pests on other plants

Find out what's wrong with your beach spider lily

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

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When to worry

If the plant is loose in the soil or the bulb feels mushy, it is likely too late to save. Treat minor surface pests immediately to prevent them from becoming a major problem.

Stopping it coming back

Inspect new plants carefully before bringing them home and keep the area around the base of the plant clean.

Beach spider lily: pests? Check yours with a photo

Every plant is a little different. Take a photo of your beach spider lily and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

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Questions people ask

How do I know if it is the bulb fly?
You will usually notice the plant failing to thrive and the bulb will feel soft when pressed. If you dig it up, you may find larvae inside.
Can I use systemic pesticides?
Systemic pesticides can help, but they are often ineffective once the larvae are already deep inside the bulb.

Guides to these causes

More problems with Beach spider lily

Back to the Beach spider lily guide

This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.