Grey Alder Tree | Alnus incanaAlnus incana or grey alder is a large deciduous tree native to Europe but now common in Britain, notable for its tolerance of poor growing conditions and its benefit to wildlife Shiny ovate leaves and pollinator attracting yellow brown catkins in February followed by characteristic long lasting hard green fruits that sustain birds in the winter. A steady grower that can end up 20 x 10m after 20 years. Possesses rare nitrogen fixing ability allowing it