- You Will Get 20 Seeds Of Red Twig Dogwood American Red Osier Shrub White Cornus Sericea Flower Seeds. - Description: - Name: Red Twig Dogwood. - Other Common Names: Red Osier Dogwood / Red-Rood / American Dogwood / Red Willow / Creek Dogwood / Western Dogwood / Redstem Dogwood. - Scientific Name: Cornus Sericea Syn. Cornus Stolonifera / Swida Sericea. - Color: White Flowers / Red Branches. - Plant Seeds: Fall Sow Seeds Or Cold Stratify. - Bloom Time: May – June. - Hardiness Zone: 3 – 8. - Plant Height: 4 - 6'. - Plant Spacing: 4 - 6'. - Light Requirements: Sun - Part Shade. - Soil & Water Preferences: Average – Moist.