- You Will Get 5 Seeds Of Flowering White Kousa Dogwood Cornus Kousa Tree Seeds. - Description: - Name: Kousa Dogwood. - Scientific Name: Cornus Kousa. - Color: White Flowers & Red Berries. - Plant Seeds: Outdoors After Frost / Fall / Cold Stratify / Indoors Weeks Before Last Frost. - Plant Height: 15 - 20 Feet. - Plant Spacing: 12 - 15 Feet. - Bloom Time: Spring. - Hardiness Zone: 5 – 9. - Light Requirements: Sun - Part Shade. - Soil & Water Preferences: Average.