- Name: Yellow Hummingbird Trumpet Vine - Other Common Names: Trumpet Creeper / Yellow Trumpet Vine - Scientific Name: Campsis Radicans Flava - Color: Yellow - Plant Seeds: Fall Sow Seeds Or Cold Stratify - Bloom Time: Summer - Fall - Hardiness Zone: 4 - 10 - Plant Height: 20 - 40' - Plant Spacing: 12 - 15" - Light Requirements: Sun - Part Shade - Soil Water Preferences: Average - Quantity: 10 Seeds - Other: The Hummingbird Trumpet Vine Is A Fast Growing Beauty! We Are Excited To Now Be Offering Them In This Lovely Sunny Yellow Color! You Can Climb Trumpet Vines Up A Fence Or A Trellis, Or Simply Let It Creep Across The Ground For A Blanket Of Blooms. As The Name Suggests, It Does Indeed Attract Hummingbirds - I Have Seen It With My Own Eyes. (I Am Tired Of All The Plants That Are Advertised As Hummingbird Attractants That Fail Miserably To Attract Even A One!) I Have Found These Plants To Be Quite Hardy, And Mine Have Put Up With A Lot (Such As Transplanting An Accidental Kerosene Spill!) And They Just Keep Getting Bigger And Better!