- Name: Native Hydrangea - Other Common Names: Smooth Hydrangea / Wild Hydrangea / Sevenbark - Scientific Name: Hydrangea Arboescens - Color: White - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost - Bloom Time: Summer - Early Fall - Hardiness Zone: 4 - 9 - Plant Height: 36 - 72" - Plant Spacing: 48 - 72" - Light Requirements: Sun - Part Shade - Soil & Water Preferences: Average - Quantity: 50 Seeds - Other: There Is Nothing Quite Like The Huge Beautiful Blooms Of A Hydrangea! This Native Species Is A Prolific Bloomer And It Will Attract Bees, Birds, And Butterflies. They Are Tolerant Plants That Can Even Be Grown In Containers.