This webinar will present the results of some new research on root pruning. Three years ago, the roots of 32 mature London plane (Platanus x acerifolia) trees growing in New Zealand, were cut, either leaving a stub, or making a reduction cut, back to a side root; half were pruned in Spring and half in Autumn. Three years later, the patterns and extents of new root regrowth and decay were examined. We'll present root response to pruning and discuss the optimum regrowth and compartmentalisation responses of these mature trees.

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