Botanical Name: Alnus rhombifolia
Common Name: White alder Type of Plant: dicot: tree Character deciduous Habit of Growth: Overall Shape a very erect, large, single trunked plant (occasionally will develop 2-3 leaders) with ascending branches forming a pyramidal canopy that becomes rounded with age; the trunk is grayish white, with A-shaped scars Height 40-80'(100') Spread 1/3-2/3 Growth Rate very rapid Environment: Exposure outdoor full or partial sun; can tolerate shade at inland locations Soil prefers moist habitats with good drainage Hardiness hardy (zones 1-9, 14-21); thrives with seasonal climates Morphology: Leaves pinnate, alternate, oval to somewhat rhombic, 2-4" long, finely serrate; dark green above; pale beneath, petioles are 1-1-1/2" long Flowers tiny, in catkins: the male catkins are cylindrical, 3/4" to 1" long, mostly terminal; female catkins are oval, 1/2" long, axillary Fruit a nutlet: flat, tiny, borne between scales of female 'cone' Propagation: seed Usage: a widely used large-scale vertical accent or shade tree, tolerant of lawn watering; groves, has shallow aggressive root system; suitable for rustic, woodsy, temperate-climate theme landscapes Landscape Care: Watering regular; thrives with heavy watering-not drought tolerant Fertilizing balanced, plus iron, in locations where drainage is poor Pruning head high when young, otherwise leave alone Pests/Diseases relatively free; tent caterpillars in native habitat Special Conditions/Other Mountains of Origin: California/Washington Family: Betulaceae Notes: |
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