Crown thinning is defined as the removal of selected ‘live’ branches growing through the crown of the tree.
Thinning of a crown can result in a much more even distribution of foliage on the tree and therefore will allow more light to penetrate through and will reduce the wind resistance on the tree. We usually recommend this over reductions as it offers a better long term prospect to the trees overall health and can also help reduce the potential for storm damage.
A crown reduction is used to reduce the height and spread of the crown of a tree by removing the ends of the branches whilst maintaining it's natural shape. Crown reduction is undertaken to allow the continued conservation of the tree as opposed to creating further problems like having to remove the tree completely.