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Woodland sage · Salvia nemorosa

Why are there bugs on my Salvia nemorosa?

Seeing pests on your woodland sage usually means the environment is too damp or crowded. Check the undersides of the leaves and the soil surface for signs of activity.

Not sure it's this? Check a photo of your plant for free

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

Check these first

  1. Inspect the leaves for slimy trails or holes.
  2. Look for white powdery spots on the foliage.
  3. Check if the plant is crowded by nearby shrubs.

Likely causes

  1. Slugs

    Most likely

    How to tell: You will see irregular holes chewed in the leaves and slimy trails left on the foliage or soil.

    What to do: Handpick them in the evening when they are active. You can also place copper tape around the base of the plant or use iron phosphate bait pellets.

  2. Powdery Mildew

    Most likely

    How to tell: This fungal issue appears as a white, dusty coating on the leaves and stems. It thrives when air circulation is poor.

    What to do: Prune back crowded stems to improve airflow. If it persists, spray the foliage with a mixture of one tablespoon of baking soda in a gallon of water.

Pests on other plants

Find out what's wrong with your woodland sage

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 amounts of damage are usually fine, but heavy slug infestations can strip a young plant quickly. Treat immediately if you see significant leaf loss.

Stopping it coming back

Keep the area around the base of your sage clear of debris and mulch to discourage slugs. Ensure the plant has plenty of space for air to move through the stems.

Woodland sage: pests? Check yours with a photo

Every plant is a little different. Take a photo of your woodland sage 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

Will these bugs kill my sage?
Slugs can damage young plants, but established sage is quite tough. Powdery mildew is mostly cosmetic but can weaken the plant if left unchecked for a whole season.
Should I use heavy pesticides?
Avoid harsh chemicals as they often hurt beneficial insects. Simple physical removal or organic remedies like baking soda are usually enough for this plant.

Guides to these causes

More problems with Woodland sage

Back to the Woodland sage 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.