- You Will Get 200 Seeds Of Organic Rose Campion Silver Catchfly Lychnis Silene Coronaria Flower Seeds. - Description: - Name: Rose Campion - Usda Certified Organic. - Other Common Names: Catchfly. - Scientific Name: Lychnis Coronaria Syn. Silene Coronaria. - Color: Magenta. - Plant Seeds: Spring Or Fall. - Bloom Time: May – July. - Hardiness Zone: 3 - 10 & Reseeds. - Plant Height: 24 - 32". - Plant Spacing: 12 - 18". - Light Requirements: Sun. - Soil & Water Preferences: Average – Dry.