Trunk girth (minimum) | Tree species |
190 cm | Birch species, hawthorn |
240 cm | Field maple, rowan, grey and goat willow, hornbeam, holly, cherry, alder |
310 cm | Oak species, ash, Scot's pine, yew, elm species |
470 cm | Lime species, sycamore, horse chestnut, poplar species, other pine species, beech, sweet chestnut, white and crack willows |