Opal tree health survey page


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OPAL - Tree health survey – join in today

The best time to do this survey is from May to late September.


Help scientists monitor and protect our trees, forests and woodland.

Trees are vital – bringing nature into urban areas, supporting the rural economy, providing food and habitats for wildlife, and helping to combat climate change.


However, our trees are under threat. The number of pests and diseases attacking them has increased in the last few years.


The government has already stepped up its activity to protect trees, andᅠyou can help too,ᅠby taking part in the OPAL tree health survey, designed in collaboration withᅠ  Forest Research andᅠ FERA.



How to take part


Step 1ᅠ– Download and print the documents below (ideally in colour) orᅠ request a printed survey pack In England or In Scotlandᅠwith reusable guides and tree ID poster.


Step 2ᅠ– Find a site with safe access to one or more broadleaved trees and start surveying!


Step 3ᅠ– Tell us what you find using ourᅠ simple online form.



About OPAL


A celebration of OPAL's work in its first five years


The Open Air Laboratories (OPAL) network is an exciting initiative that is open to anyone with an interest in nature.


We aim to create and inspire a new generation of nature-lovers by getting people to explore, study, enjoy and protect their local environment. In 2007 OPAL received a grant of £11.75 million from the Big Lottery Fund.

Free Downloads – what you need to get involved

Ready to enter your results online?


Enter your tree health survey results


Just want to submit a possible pest or disease sighting?

Use the form below to tell us about a pest or disease you've spotted outside the survey. Please include a photo if you can.


Just submit a pest or disease sighting


Learn more about pests and diseases that can affect trees


Problems entering your results online?

Send your results to:


FREEPOST RSCH-CHYJ-HYYC, OPAL, Centre for Environmental Policy, Imperial College, South Kensington, London SW7 2AZ.



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