Treework CODIT Workshop

Understanding the CODIT Principle: Implications for Tree Care

Treework in conjunction with Kew Gardens (link: https://www.kew.org) are delighted to announce the opportunity to join renowned arboriculture expert Dirk Dujesiefken for an in-depth exploration of the CODIT Principle – Compartmentalization of Damage in Trees – and its profound implications for modern tree care practices. In this one-day workshop you will discover how trees respond to injury, from the initial air embolism to the final encapsulation of decay and learn how arboricultural interventions can be adapted to support tree health and longevity.

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This EXCLUSIVE one-day workshop on CODIT will be the first of its kind in the UK and will be held in April 2026. Places are limited!

Dirk Dujesiefken is a highly influential German arboricultural expert. He founded the Institute of Arboriculture in Hamburg in 1990 and served as its head for 25 years before becoming a lead scientist. His work has significantly shaped the understanding of trees in urban environments, particularly through his pioneering contributions to the Compartmentalization of Decay in Trees (CODIT) model and the development of tree management standards across Europe. Dujesiefken also holds an honorary professorship at HAWK University and is the managing director of the German Tree Care Conference. He has authored numerous books and articles on tree biology, pruning, and protection.

In the CODIT workshop you will gain insights into:

• The Updated definition of CODIT and its relevance to tree physiology.
• The sequence of tree wound responses across four distinct phases:

Phase 1: Air intrusion and initial tissue death.

Phase 2: Invasion by harmful agents and early defence.

Phase 3: Spread of decay and secondary reactions.

Phase 4: Encapsulation as a survival strategy.

• How different tree species react to injury and the variability in wound responses.
• Why understanding CODIT is essential for minimizing long-term damage from pruning and other interventions.
• Best practices for tree care that align with natural healing processes.
• How to tailor treatments to ensure trees reach Phase 4 and successfully encapsulate damage.

Get Tickets

Places are limited so book your place now, as we do not know when this opportunity will next be available in the UK!