Russian Olive vs Black Cottonwood - TreeTime.ca

Russian Olive vs Black Cottonwood

Populus trichocarpa

Elaeagnus angustifolia

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Black Cottonwood
Russian Olive

Black Cottonwood is the largest and tallest of the North American poplars. Named after its white, fluffy seeds with cottony hairs, this hardy tree produces sticky, fragrant buds and has a straight growth habit. Black Cottonwood needs ample moisture and nutrients to grow successfully to full height and are found in the Western provinces and the Yukon with BC being its heartland.

Russian Olive is a medium-sized deciduous tree that has attractive silvery coloured foliage with small yellow flowers that emit a fragrant sweet smell.

It is drought and salt tolerant, and works well as a shelterbelt species. Russian Olive can also be used to combat erosion.

Note: although Russian Olive is planted as an attractive boulevard tree in many northern areas, in warmer areas it can invade watersheds and is considered invasive. Please do some research and plant the right tree in the right place.

Black Cottonwood Quick Facts

Russian Olive Quick Facts

Zone: 4a
Zone: 2a
Height: 30 m (100 ft)
Height: 9 m (30 ft)
Spread: 11 m (35 ft)
Spread: 5 m (15 ft)
Light: full sun
Light: full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: fast
Growth rate: medium
Life span: long
Life span: medium
Suckering: medium
Suckering: none
Maintenance: medium


Foliage: silver scales
Flowers: yellow
Fruit: silver-yellow, olive-like
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no


In row spacing: 1.8 - 2.4 m (6 - 8 ft)
Between row spacing: 5 m (16 ft)
Native to: AB, BC, YT
Other Names: balsam cottonwood, california poplar, western balsam poplar
Other Names: silver berry oleaster, wild olive