- Name: American Silverberry - Other Common Names: Wolf Willow / Silverberry / Wolfberry / Wild Olive - Scientific Name: Elaeagnus Commutata - Color: Yellow Flowers / Silvery Berries / Silvery Foliage - Plant Seeds: Fall / Cold Stratify / Outdoors After Frost / Indoors Weeks Before Last Frost - Harvest: Fall - Bloom Time: Late Spring - Early Summer - Hardiness Zone: 2 - 6 - Plant Height: 3 - 12' - Plant Spacing: 5 - 10' - Light Requirements: Sun - Part Shade - Soil & Water Preferences: Average - Quantity: 10 Seeds - Other: The American Silverberry Is A Super Cold Hardy Deciduous Shrub To Small Tree That Is Native To The Northern Us & Canada. Naturally, They Have A More Shrub-Like Stature, But Take To Pruning Well & Can Be Sculpted Into A Tree With Little Effort. Silverberry Plants Are Tolerant To A Variety Of Conditions Including Coastal (Salt & Wind), Drought, Sandy Or Rocky Soil, Heavy Clay Soil, & Nutritionally Poor Soil. They Can Even Help To Fix The Nitrogen In The Soil. The Thornless Silverberry Is Fast Growing & Long Lived, & Will Spread By Rhizomes To Form Colonies Without Being At All Invasive.