Moisture-loving trees that thrive in moist or wet soils, even tolerate periodic flooding. Good near creeks and other waterways. Very fast growing. In all species, clusters of tassel-like, greenish yellow male flower catkins give interesting display before leafout. Female flowers develop into small woody cones that decorate bare branches in winter; these delight flower arrangers. Seeds attract birds. Alders need little pruning except to remove suckers, crossing branches, and dead wood.Alnus glutinosa
Native to Europe, North Africa. Probably best as multistemmed tree; grows moderately quickly to 70 ft. tall, 30 ft. wide. Roundish, 2–4-in., coarsely toothed leaves in lustrous. Makes dense mass from ground up. Good for screening.
Native to western North America; the state flower of Idaho. Fountain-shaped, loosely branched shrub 4&...
Native to Europe, North Africa. Probably best as multistemmed tree; grows moderately quickly to 7...
Native from the Mediterranean to Iran. Dependable old favorite. Forms mat of leaves to 6 in. high, 1 1...