What’s this fungus growing on my tree? Is it killing the tree and making it unsafe?

Many fungi grow on trees, but not all fungi mean a tree is dying or dangerous.

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HA Trees And Countryside Or Wildlife 09

What’s this fungus growing on my tree? Is it killing the tree and making it unsafe?

Many fungi grow on trees, but not all fungi mean a tree is dying or dangerous.

Some indicate decay, while others are harmless.

What fungi can indicate

Fungal growth may suggest:

  • Internal decay
  • Dead wood
  • Normal ecological processes

The significance depends on species, location, and tree condition.

What you should do

  • Take photographs
  • Note where the fungus is growing
  • Avoid removing it without advice

When to seek professional hel

A professional can:

  • Identify the fungus
  • Assess structural implications
  • Recommend management options
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If your tree is showing symptoms of ill health, which may be related to pest or disease, cultural or other reasons, you can send samples to the following organisations for analysis. Or consider engaging the service of an Arboricultural Association Registered Consultant or Approved Contractor. Please note: charges apply for these services.

Forest Research, offer analysis of and advice on tree health and related matters.

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Tree Health Diagnostic and Advisory Service

Use Tree Alert to report tree pests and diseases

Analysis is also available from the Bartlett Tree Expert Research Laboratory.

Next steps