- Name: Red Mulberry Tree / Bush - Scientific Name: Morus Rubra - Color: White Flowers / Red Fruit - Plant Seeds: Outdoors After Frost / Fall / Cold Stratify / Indoors Weeks Before Last Frost - Bloom Time: Spring - Hardiness Zone: 3 - 9 - Plant Height: 25 - 35’ - Plant Spacing: 25 - 35’ - Light Requirements: Sun - Soil & Water Preferences: Average - Quantity: 15 Seeds - Other: Young Mulberry Trees Grow Quickly. Their Sweet Fruit Is Edible And Is Widely Uséd In Pies, Tarts, Jams, Wines, Cordials And Tea. Red Mulberries Have The Strongest Flavor. Mulberry Tree Leaves Are The Singular Food Source For Silk Worms, But If You Are Like Me, You Can’t Help But Think Of Weasels 