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sharp-leaf willow

Photo: Dmitriy Bochkov, CC BY 4.0, via iNaturalist · Бобровский р-н, Воронежская обл., Россия, 2023-06-16

Shrubs and vines · Introduced from northern Europe and Asia

sharp-leaf willow

Salix acutifolia Salicaceae

Sharp-leaf willow is a fast-growing, upright willow with long, narrow, pointed leaves. Its young shoots are deep purple to dark red and covered in a white, waxy bloom, so the stems look frosted in winter. Silvery catkins open in early spring before the leaves, the male ones dusted with gold pollen. Leaves turn yellow in fall, and the plant can reach small-tree size if left unpruned.

Latin
Salix acutifolia
Willd. · family Salicaceae
English
sharp-leaf willow
Siberian violet-willow, long-leaved violet willow, acute willow
French
saule à feuilles aiguës
saule de la Caspienne
Kanien'kéha (Mohawk)
ó:se'
Genus-level: kanienkeha.org vocabulary glosses ó:se' simply as 'willow'; no species is distinguished.
Anishinaabemowin (Ojibwe)
Name not yet recorded
No species-specific name found for this Eurasian willow. The Ojibwe People's Dictionary gives oziisigobiminzh as a general word for a willow.

Through the year

sharp-leaf willow in every season.

Story

The history of sharp-leaf willow.

Sharp-leaf willow grows wild from northern Europe across Siberia and Central Asia to the Caucasus, usually on moist ground near water. Each plant is either male or female, and its early catkins are visited by bees and other insects. Its extensive root system binds sandy soil, and it tolerates heavy clay and exposed sites.

The German botanist Carl Ludwig Willdenow named the species, and acutifolia means sharp-leaved. Its flexible stems have long been cut back annually and harvested for basketry. Because it is very cold-hardy, it became a long-standing shelterbelt and windbreak plant on the Canadian prairies, although much of what is sold under this name is of hybrid origin. A male selection, 'Blue Streak', has the Royal Horticultural Society's Award of Garden Merit.

Sources: Wikipedia: Salix acutifolia · Plants For A Future: Salix acutifolia · University of Saskatchewan Gardening: Willow

Where it comes from

How it got to Canada.

Native rangeNorthern Europe to eastern Asia, including Finland, Russia and Siberia, Kazakhstan and the Caucasus

Sharp-leaf willow came to Canada as a hardy ornamental and shelter plant from cold parts of Europe and Asia, and it has long been grown on the prairies in shelterbelts and windbreaks. It is not listed in the Database of Vascular Plants of Canada (VASCAN), which tracks naturalized species, so it is treated here as a cultivated plant that has not escaped into the wild in Quebec.

Sources: University of Saskatchewan Gardening: Willow · Chicago Botanic Garden: Salix acutifolia

Characteristics

The plant at a glance.

Height5 to 8 m if unpruned; up to 10 m in the wild
Spread4 to 7 m
HabitUpright, fast-growing multi-stemmed shrub or small tree
Bloom timeEarly spring, before the leaves
FlowersCatkins; male catkins about 5 cm, silvery with gold anthers; female catkins green, about 3 cm
FoliageLong, narrow, pointed leaves up to 10 cm, turning yellow in fall
FruitSmall capsules releasing fluffy seeds in late spring on female plants
HardinessZone 4 (some prairie sources rate it hardier)
LightFull sun
MoistureMoist to wet; tolerates heavy clay
Spread behaviourClumping with a low-suckering root system; roots easily from cuttings
Native rangeNorthern Europe to eastern Asia
Quebec statusNot native, cultivated

In the Flight Path Garden

Where it grows here.

ZonesMini-Forest
How many5
Planted2025

In the Mini-Forest these willows fill space quickly while slower trees establish, give bees one of the earliest pollen sources of the year, and add frosted purple stems for winter colour.

Wildlife

Who uses it.

  • Catkins open in early spring before the leaves and are pollinated by bees and other insects, giving them very early pollen and nectar.
  • Fast, dense growth and an extensive root system give shelter and help hold soil in place.
  • Frosted purple young shoots remain visible through winter, adding structure and perching cover for birds.

Sources: Plants For A Future: Salix acutifolia · Chicago Botanic Garden: Salix acutifolia · Wikipedia: Salix acutifolia

Care

What to do, season by season.

Spring

Enjoy the catkins in April, then cut back a few of the oldest stems near the base if the shrubs are crowding neighbours. Pruned stems can be pushed into moist ground to root new plants.

Summer

Water during long dry spells in the first two years; established willows handle wet and clay soils well.

Fall

Leave fallen leaves in place as mulch for the mini-forest floor.

Winter

Late winter is the best time for heavier coppicing, since the bare stems show the plant's structure and the cut stems can be used for weaving.

Relations

Knowledge and use.

The flexible stems of sharp-leaf willow are traditionally coppiced each year for basket-making in its native range. In Canada it has a long history as a prairie shelterbelt and windbreak tree.

Source: Plants For A Future: Salix acutifolia · University of Saskatchewan Gardening: Willow