Breakthroughs in the growing, planting and relocation of large trees have had a major impact on UK arboriculture and facilitated a new approach to the issue of trees on development sites. The desire to move large trees is not new, as colourful accounts from the days of Capability Brown will testify. What has changed is the scale of things - the size and availability of planting stock and the improvement in results borne of years of research and development. The age of the instant landscape has dawned, and with it exciting new visions of what can be achieved. The advent of the Air-Pot container system has been key to the development of the semi-mature market. Basic but effective, the plastic Air-Pot material is textured like an egg carton with outward facing perforations. The lack of flat surfaces means there are no spiralling roots, and root tips deflected towards the perforations are effectively killed or "air pruned". This encourages fibrous root growth, which is good for the tree.
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