From Longman Dictionary of Contemporary Englishold-growthˈold-growth adjective [only before noun] → old-growth forests/rainforest/timber etc
Examples from the Corpus
old-growth• But propaganda that all old-growth forests are being hacked down willy-nilly is nonsense.• The floors of old-growth forests tend to be fairly sterile because overhead canopies of leaves prevent light from reaching the ground.• Like the northern spotted owl, the tiny bird is dependent on old-growth forests.• Somehow they have to protect Young as if he were the last old-growth redwood tree.• Frank Riggs, R-Windsor, whose district includes the hotly contested grove of old-growth redwoods.• The report has been welcomed by many legislators as the most authoritative and independent assessment of the old-growth timber industry ever prepared. 