- Name: White Butterfly Bush - Other Common Names: Summer Lilac - Scientific Name: Buddleia Davidii - Color: White - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost - Bloom Time: Mid Spring - All Summer - Hardiness Zone: 4 - 9 - Plant Height: 72 - 96" - Plant Spacing: 48 - 60" - Light Requirements: Sun - Soil Water Preferences: Average - Quantity: 50 Seeds - Other: The Tiny Fragrant Flowers Of The Butterfly Bush Cluster Together In Huge Cone Shaped Bunches For A Lovely Display. They Make An Excellent Cut Flower And Attract All Of The Good Stuff - Bees, Butterflies Including Monarchs, And Birds Including Hummingbirds! I Think They Are Very Appropriately Named Because I Can Tell You There Is No Other Flower In My Yard I See More Butterflies On.