Salix alba (White Willow)


Botanical Information

FamilySalicaceae
GenusSalix
Speciesalba
CategoryWoody
TypeTree (deciduous)
OriginEurope, North Africa to Central Asia.
Pronunciation

Details

USDA Hardiness Zone2
USDA Hardiness Ref.
Canadian Hardiness Zone0
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)-46 - (-40)
Temperature (°F)-50 - (-40)
Height25 m
GrowthFast
Flowering PeriodApril, May

Description and Growing Information

General DescriptionA fast-growing dioecious tree with yellow-brown bark, grey-green leaves that are white beneath and turn various shades of yellow in autumn, and male and female catkins in spring.
ShapeA broad, loose, open crown.
LandscapeWhile this tree is not great for most residential areas, will do well in areas where other trees and shrubs will falter, and along rivers or ponds.
CultivationGrow in full sun in a moist to wet, well-drained soil.
PestsWatermark disease (Brenneria salicis), Willow anthracnose (Marssonina salicicola).
Bark/Stem DescriptionThe bark is grey-brown, deeply fissured in older trees.
Leaf DescriptionThe leaves are paler than most other willows, due to a covering of very fine silky white hairs, particularly on the underside. They are 5-10 cm long and 5-15 mm wide.
Flower DescriptionThe flowers are produced in catkins in early spring, and pollinated by insects. It is dioecious, with male and female catkins on separate trees; the male catkins are 4-5 cm long and the female catkins are 3-4 cm long at pollination, lengthening as the fruit mature.

Photographs