- You Will Get 25 Seeds Of Tower Of Jewels Red Bugloss Echium Wildpretii Ruby Hummingbird Flower Seeds. - Description: - Name: Tower Of Jewels. - Other Common Names: Red Bugloss / Tenerife Bugloss / Mount Teide Bugloss / Wilpret's Bugloss. - Scientific Name: Echium Wildpretii / Echium Bourgaenum. - Color: Maroon, Cranberry, Ruby Red. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Bloom Time: Summer. - Hardiness Zone: 9 – 11. - Plant Height: 5 - 10'. - Plant Spacing: 36 - 48". - Light Requirements: Sun. - Soil & Water Preferences: Average – Dry.