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Wild Blue Phlox · Phlox divaricata

What is eating my Wild Blue Phlox?

It is less common for this plant to suffer from severe pest infestations, though it is prone to powdery mildew which can weaken the plant. Check the undersides of the leaves for small insects if you notice holes or discoloration.

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

Check these first

  1. Examine the undersides of leaves for tiny bugs.
  2. Look for fine webbing between stems.
  3. Check for sticky residue on the foliage.

Likely causes

  1. Aphids

    Most likely

    How to tell: You see tiny green or black insects clustering on the new growth or flower buds. They leave behind a sticky residue called honeydew.

    What to do: Spray the affected areas with a strong stream of water to dislodge the insects. Use insecticidal soap or neem oil if the infestation persists, following label instructions.

  2. Spider mites

    Possible

    How to tell: Fine webbing appears between the leaves or stems, and the foliage looks stippled or pale. These pests thrive in hot, dry conditions.

    What to do: Increase humidity around the plant by misting or improving airflow. Wash the leaves with water and apply neem oil to control the population.

Pests on other plants

Find out what's wrong with your wild blue phlox

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

Small numbers of pests are usually manageable, but you should worry if the plant shows signs of stunted growth or heavy leaf damage. If the plant is covered in webbing or large colonies of insects, take action immediately.

Stopping it coming back

Keep the plant healthy with proper watering and good air circulation to discourage pest buildup.

Wild Blue Phlox: pests? Check yours with a photo

Every plant is a little different. Take a photo of your wild blue phlox 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

Are these bugs harmful to other plants?
Yes, aphids and spider mites can easily spread to nearby plants. Isolate your phlox if you notice an active infestation.
Can I use home remedies for pests?
A simple mixture of water and a few drops of mild dish soap can work for light aphid infestations. Always test a small area first to ensure it does not burn the leaves.

Guides to these causes

More problems with Wild Blue Phlox

Back to the Wild Blue Phlox 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.