Botanical Name: Populus trichocarpa
Common Name: Black cottonwood Type of Plant: dicot: tree Character deciduous Habit of Growth: Overall Shape an erect, mostly single-trunked tree which becomes both tall and broadly spreading with age; canopy is oval or pyramidal in youth, eventually rounded at maturity; gray, furrowed bark with age Height 30-60'(150') Spread 1/2-2/3 Growth Rate rapid Environment: Exposure outdoors full sun preferred; tolerates partial Soil sandy, fast-draining moist soils preferred; tolerates most Hardiness hardy (zones 1-7, 8-21); thrives in hot interior valleys Morphology: Leaves pinnate, alternate (somewhat crowded at branch tips); ovate 2-5" long, with finely serrate margin; apex somewhat acuminate Flowers plants are dioecious: male catkins 2-3" long, falling early; female catkins 2-4" long, hanging on branch Fruit cottony seed masses, released from female trees Propagation: seed (stratify); hardwood cuttings Usage: a large, fast-growing shade tree for warm locations; has a very invasive root system - avoid using in small areas; suckers develop from roots in heavy soils; best for rustic, informal landscapes Landscape Care: Watering likes regular, deep watering; plants can be kept much smaller if given only an occasional soaking Fertilizing little is needed after established Pruning head high and develop scaffold structure; head back & thin Pests/Diseases bark-boring and wood-boring beetles; termites; leaf miners Special Conditions/Other Origin: Western United States Family: Salicaceae Notes: |
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