Cut-leaved Alder A cut-leaved form of the native common alder, Alnus glutinosa Laciniata is a tall, vigorous, very fast-growing, deciduous tree, slightly smaller than common alder, with a graceful, pyramidal, open habit. The deep green leaves are like those of common alder, but deeply cut into pointed lobes, very attractive against the sky. Small brownish-yellow catkins are followed by brown, cone-like fruits. The roots have nitrogen-fixing nodules which make this a good tree for poor or waterlogged soil or beside streams. Cut-leaved alder is tolerant of urban pollution, but is perfect for a naturalistic planting on wet soil where a more ornamental form of a native tree is wanted. Site: Tolerates exposureSoil: Any soil, including water-logged soilPosition: Full sun or partial shadeSeason of interest: Spring to autumnHardiness: Fully hardyHeight: 65’ (20m) Spread: 33’ (10m)