About Trees – Kent Tree Surgeons


How Serious Is Ash Dieback?

Spotting the signs and knowing what can happen if Ash Dieback isn’t properly treated

Ash Dieback has become a serious issue in recent decades, with the disease targeting ash trees throughout the UK and causing their death. In this article, we’ll cover how individuals can spot the early signs of Ash Dieback, how they can inform themselves of what happens if the disease isn’t properly treated, and what they can do to stop the disease from spreading.

Ash Dieback is an incredibly destructive disease, which is currently affecting the UK’s native ash species and leading to damage to our natural ecosystems.

The disease, which is caused by a fungus named Hymenoscyphus fraxineus, was first identified in 2006. It is believed to be of Eastern Asian origin, but has spread throughout many parts of Europe in recent decades. Ash Dieback’s spread was so chronic that it even led the New Scientist magazine to ask the question of whether or not Europe’s ash trees were “finished”, due to the disease’s seemingly unstoppable spread.

The disease was first found in the UK in 2012. While there have been many attempts to mitigate or halt the spread of it in the years since then, it continues to be present throughout much of the UK.

Tree maintenance groups, environmental groups, and other governing bodies throughout the UK are working hard to continue fighting against the spread of Ash Dieback. But individuals in the UK can also play their part, by understanding the disease and alerting relevant groups to its presence in specific areas.

Here’s everything you need to know about spotting the signs of Ash Dieback, what can happen to ash trees if the disease is not properly treated as we answer the question ‘How Serious Is Ash Dieback?’.

What is ash dieback?

Ash Dieback, scientifically known as Hymenoscyphus fraxineus, is a fungal disease that specifically targets ash trees.

Likely originating from Asia, Ash Dieback is an invasive pathogen that has spread across Europe, the British Isles, and North America. The fungus infects trees through their leaves, and can quickly spread throughout the entire tree, ultimately leading to its death. The spores of the fungus can be transmitted by wind, which explains the rapid spread of the disease throughout various countries and continents.

What telltale signs should I look out for when it comes to spotting Ash Dieback?

When trying to identify Ash Dieback, there are several key signs to look out for.

One of the biggest early warning signs to look out for is Crown Dieback, meaning the death or withering of branches at the top of the tree. Premature leaf loss and reduced canopy density are also common characteristics.

Another notable symptom is the wilting and blackening of the leaves, particularly at the tips and edges (leaves which are affected by the disease will often give off the appearance that they have been “burnt”).

As the disease progresses, you may also observe diamond-shaped lesions on the bark (although the exact shape can often vary). These lesions indicate the disease’s invasion within the bark and the tree’s tissue. Additionally, the presence of small, white fruiting bodies on the bark can indicate a severe infection.

Why should I be worried about Ash Dieback?

Ash Dieback poses a genuine, existential threat to both individual ash trees and entire ecosystems.

If left untreated, the disease can lead to the widespread death of ash trees, which are a crucial component of the landscapes and habitats in Kent and, indeed, in counties throughout the UK.

Beyond the obvious aesthetic benefits of having plenty of beautiful ash trees in our natural environments, society should always be made aware that ash trees provide essential ecological services, such as habitat for wildlife, carbon sequestration, and soil stabilisation. The loss of these trees on a widespread basis will almost certainly have knock-on effects on the UK’s biodiversity and ecosystem health.

Got it. What should I do if I spot Ash Dieback?

If you suspect that an ash tree is infected with Ash Dieback, it is essential to act promptly to prevent the spread of the disease. Contact a professional arborist, tree surgeon, arboriculturist, or forestry expert – such as About Trees Ltd – to confirm the diagnosis and discuss treatment options. While there is no cure for Ash Dieback, early detection can play a massive role in minimising the disease’s spread.

About Trees Ltd has been proud to play a decisive role in fighting against Ash Dieback in the UK, ensuring that our country’s natural habitats stay healthy and full of life.

Conclusion: Spot the signs – get the treatment

When we think back to the question “How Serious is Ash Dieback?”, we hope you’ll agree based on our blog that it is a fairly strong disease affecting UK trees.

Individuals who are armed with the knowledge of how to spot the signs of Ash Dieback – such as wilting or darkened leaves, Crown Dieback, Lesions on the bark, or epicormic growth (meaning shoots growing from the trunk or branches) – will be well-placed to contact professionals who can deal with the issue.

About Trees Ltd are committed to preserving the health of trees in the UK – as well as fighting back against Ash Dieback.

If you believe you have a case of Ash Dieback, then please get in touch to find out how we can help.

Equality Policy

Introduction – Our Equality Policy

At About Trees Ltd., we recognise and celebrate the diversity of the communities we serve and understand the vital importance of inclusivity and equality in all aspects of our work. Our commitment to diversity, equality, and inclusion is rooted in our belief that a diverse workforce, treated equitably and included in decision-making, fosters innovation, creativity, and a deeper understanding of our clients’ needs. This policy outlines our comprehensive approach to ensuring a welcoming, fair, and inclusive environment for all employees, clients, and partners.

Policy Statement

About Trees Ltd. is steadfast in its commitment to promoting diversity, ensuring equality, and fostering an inclusive culture for all employees and applicants without regard to age, disability, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex, and sexual orientation. We are dedicated to creating a workplace where everyone’s rights are respected and where any form of discrimination, harassment, or exclusion is actively opposed.


Promote an Organisational Culture that Embraces Diversity and Equality**: Cultivate an environment where individual differences are valued, and all employees are treated equitably and with respect.

Ensure Equal Opportunities in Employment**: Guarantee fairness in recruitment, career progression, training, and rewards for all employees, addressing and eliminating any barriers to equality.

Inclusivity and Equality in Service Delivery**: Ensure our services are accessible, equitable, and accommodating to all clients, reflecting the diversity of the community we serve.

Supplier Diversity and Equality**: Commit to supporting diversity and equality among our suppliers and contractors, recognising the value of diverse and equitable perspectives in enhancing our business.


Recruitment, Selection, and Promotion**: Adopt inclusive, transparent procedures designed to promote diversity and equality. Job advertisements will welcome applications from all, and selection criteria will be based solely on skills and competencies relevant to the role.

Training and Development**: Provide comprehensive diversity, equality, and inclusion training to all employees, fostering an understanding, respect, and appreciation for diversity and equality within the workplace.

Workplace Adjustments**: Make reasonable adjustments to ensure our workplace is inclusive, accessible, and equitable for employees with disabilities or other needs.

Complaints and Grievances Procedure**: Implement a clear, accessible process for employees to raise concerns or complaints about discrimination, bullying, harassment, or any equality issues. All complaints will be treated with the utmost seriousness and investigated promptly and thoroughly.

Monitoring and Review

The effectiveness of this policy will be monitored continuously, with an annual review to assess its impact and effectiveness. Employee, client, and partner feedback will be integral to informing ongoing improvements.


Every member of About Trees Ltd. is responsible for contributing to a diverse, equitable, and inclusive environment. The Directors hold overall responsibility for implementing this policy, with managers ensuring its application within their teams.

This policy has the full endorsement of the senior management of About Trees Ltd. and has been developed in alignment with best practices, including those outlined in the “Diversity and Inclusion: Strategy and Policy Guidance Advice.”


At About Trees Ltd., we believe that our strength is in the diversity and equality of our workforce. By adhering to the principles outlined in this policy, we commit to creating an environment where everyone is treated equitably, with respect, and where every individual has the opportunity to achieve their full potential.

To read our other Policies including Working At Height, Wildlife and Ecology, Health and Safety and Insurance, please click here.

About Trees Ltd. Diversity, Equality, and Inclusion Policy

Date: March 2024