Silverberry (Wolf Willow) vs Red Mammoth Raspberry - TreeTime.ca

Silverberry (Wolf Willow) vs Red Mammoth Raspberry

Elaeagnus commutata

Rubus sp. SK Red Mammoth

COMING SOON

(new stock expected: fall of 2026)

COMING SOON

(new stock expected: fall of 2026)

Silverberry (Wolf Willow)
Red Mammoth Raspberry

Silverberry (also known as Wolf Willow) is a common native North American shrub. This beautiful ornamental plant has characteristic silver leaves and fragrant yellow flowers.

Its silver berries remain on the branches through the winter. Silverberry is cold hardy and has some ability as a nitrogen fixer. It can grow on dry to moist sandy/gravel soils. This plant is very low maintenance.

Developed by the University of Saskatchewan Fruit Program, SK. Red Mammoth was a high yielding and firm variety released in 1999. It produces distinctively large bright red berries about 1 inch wide. It is also more cold hardy than older raspberry cultivars. Red Mammoth is firm which makes it suitable for commercial production and sweeter than Boyne. Floricane.

Needs to be trellised as canes are not as sturdy as other varieties.

Silverberry (Wolf Willow) Quick Facts

Red Mammoth Raspberry Quick Facts

Zone: 1a
Zone: 3a
Height: 3 m (10 ft)
Height: 2.4 m (8 ft)
Spread: 0.9 m (3 ft)
Spread: 1.2 m (4 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: normal, wet
Growth rate: fast
Growth rate: medium
Life span: short
Life span: short
Suckering: high
Suckering: medium
Maintenance: medium


Foliage: silvery leaves
Flowers: yellow
Berries: silver, edible
Berries: very large
Firmness: firm
Flavor: sweet
Harvest: June-July
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON, QC, YT, NT, NU
Other Names: american silverberry, silver berry, wolf willow