Arboretum and tree collections in Britain

Britain has many wonderful collections of trees in arboretums (arboreta), botanic gardens and country parks.  Many of these are some of the oldest collections in the world.  I’ve created an interactive Google map showing 23 of the finest collections of trees in Britain. Click on the map icons to read more about each collection and… Read More

How big will this tree grow?

Many people are interested in how big a tree’s crown will grow. It can be important in planning gardens, managing street trees, forest silviculture and in assessing the health of ancient trees. Estimating tree height is very imprecise as it is dependent on so many different factors.  However, I wrote recently about the very good… Read More

Being positive about street trees

Trees in our streets improve air quality, provide beneficial micro-climate, enhance property values and aesthetics, attenuate storm water, conserve energy, reduce noise pollution, provide wildlife habitat, and have a positive effect on physical and mental human health. There’s no denying that trees can cause problems in the built environment. Their roots can disturb pavements, roads… Read More

Climate change and global trade – a lethal combination for trees

Trees in the UK are facing significant threats on two major fronts. The warming climate is making new territories habitable for unwanted pests and pathogens; while our insatiable appetite for the newest or cheapest plants and woody materials, imported via global trade, is making the situation ever worse. Global trade The massive growth in the… Read More

Tree wound occlusion

The ability of a tree to heal itself quickly following pruning is important as it reduces the risk of infection, reduces the impact on tree growth, and improves the quality of its timber. I’ve written previously about how to prune a tree and if you follow these guidelines correctly, the tree will be able to… Read More

Pruning young trees

Young forest trees often require some form of ‘formative’ shaping or pruning during the first 5-10 years after planting.  I co-wrote a practical guide on this subject for Woodland Heritage, and created the artwork that I’ve reproduced here.     Young trees may require pruning for a variety of reasons, including damage from perching or… Read More