- Name: Violetta Verbascum - Other Common Names: Purple Mullein - Scientific Name: Verbascum Phoeniceum 'Violetta' - Color: Bold Purple - Plant Seeds: When Soil Temp Warms To 70f - Bloom Time: June - Aug - Hardiness Zone: 4 - 8 - Plant Height: 24 - 36" - Plant Spacing: 18" - Light Requirements: Sun - Soil & Water Preferences: Average - Quantity: 50 Seeds - Other: Verbascum Has A Long Bloom Period, & Will Rebloom During The Season. Super Showy Flowers Cover Tall Spikes That Rise Above The Foliage. Violetta’s Flowers Are An Amazingly Bright & Bold Shade Of Violet Purple That You Can See From A Mile Away :)