https://www.nomixenviro.co.uk/index.php/products/conventional-herbicides/ecoplug-max
(s) species stump diameter in cm number of ecoplugs group alder, aspen, beech, birch, elm, lime, maple, mountain ash, willow - cm - cm - cm - cm > cm - cm between plugs each buttress root group ash, cherry, bird cherry, oak - cm - cm - cm - cm > cm - cm between plugs each buttress root group poplar, rhododendron...