Different types of ectomycorrhizal fungi have evolved distinct strategies for acquiring nutrients from soil and transferring them to trees. The study proposes that these fungi can be arranged on a spectrum from ‘absorbers’ that quickly grab available nutrients in fertile forests to ‘miners’ that slowly exploit tough organic matter in poor forests. This framework explains why the same fungus behaves differently depending on soil fertility and unifies seemingly contradictory observations about fungal responses to nutrient additions.