Black bootlaces in the soil and white fans under the bark are the classic signs.
The fungus spreads through the soil from root to root.
An infected tree can fail without much warning, so get it assessed.
The signs to look for
The most reliable sign is below ground or under bark. Black, root-like strands called rhizomorphs, often compared to bootlaces, spread through the soil from infected roots and stumps. Between the bark and the wood at the base of an infected tree or shrub, a sheet of white, fan-shaped fungal growth smells distinctly of mushrooms.
Above ground, clusters of honey coloured toadstools appear around the base of infected plants or old stumps in autumn. Before any of these show, the plant itself often declines: sparse or yellowing leaves, dieback in the crown, cracking or bleeding at the base, or a shrub or hedge plant dying while its neighbours stay healthy.
What it means for the tree or hedge
Honey fungus attacks the roots and the base of the trunk, killing the tissue that carries water and holding the plant in the ground. Some plants decline over several years; others, already stressed, go quickly. Hedges are particularly vulnerable because the fungus passes from root to root along the run, which is why a dying section of hedge tends to spread along the line.
The serious risk is structural. A tree whose base and main roots are decayed can fall with little warning, sometimes in calm weather rather than in a storm. A large tree near a house, road or play area that shows these signs should be assessed promptly rather than watched for another season.
When the tree has to come down
There is no treatment that cures an infected tree. Where a tree is dead, clearly dying or structurally compromised, removal is the responsible option, and it is worth doing before the tree chooses its own moment. Felling a decayed tree is more hazardous than felling a sound one because the wood cannot be relied on to behave normally, so this is work for someone experienced rather than a DIY weekend.
Removing the stump and as much of the root system as practical reduces the food source the fungus survives on. Our tree removal service covers felling in confined gardens, and stump grinding deals with what is left. If the tree has already failed or dropped limbs, what to do with a storm damaged tree explains the immediate steps.
Protecting the rest of the garden
The fungus persists in the soil on old root material, so replanting straight into the same spot with a susceptible species invites a repeat. Tough, less susceptible plants cope better, and removing as much old root as practical helps. Healthy, well watered plants resist infection far better than stressed ones, so aftercare of the surrounding hedge or border matters.
Not every dying plant is honey fungus. Drought, waterlogging, root damage and other diseases produce similar decline, and other bracket fungi behave differently. Our guide to ash dieback covers the most common lookalike confusion for ash. Where you are unsure, an assessment before removing anything is money well spent, because a sound tree lost to a wrong diagnosis is gone for decades.
Getting it looked at
If you have found bootlaces, white fans under bark or autumn toadstools near a declining tree or hedge, take photographs and note what has changed and when. Craig can assess the tree, tell you honestly whether it needs to come down, and quote for the removal and stump work if it does.
Need it sorted? Book a tree removal assessment, or send photos through the quote form.
