Treeconomics is set to host a webinar on Wednesday 30 September exploring the thinking behind 3-30-300, what the data can tell us, and what councils can learn.

The 3-30-300 principle has become one of the most talked-about ideas in urban forestry. The idea is everyone should be able to see three trees from their home, live in a neighbourhood with 30% tree canopy cover, and be within 300 metres of a good-quality green space.

But what happens when you actually apply it to a real town?

The webinar will explore the key questions:

• Does good canopy cover necessarily mean residents experience plenty of trees?
• Can a town have lots of green space but still leave some communities low on trees?
• How can 3-30-300 data help councils decide where limited resources could make the biggest difference?

Speakers include:

Dr Cecil Konijnendijk, the urban forester who proposed the 3-30-300 principle, will take it back to where it all began. Konijnendijk will explore why he developed the principle, the evidence and thinking behind those three numbers, and how 3-30-300 has grown from a simple idea into an internationally recognised benchmark for greener, healthier neighbourhoods.

Scott Watson, arboricultural officer at Hartlepool Borough Council, will share what the council discovered from its assessment in 2026: where the town performs well, where the gaps are, what surprised them, and how the findings will help with future planning.

To register, click here.