Tecoma Is A Genus Of 14 Species Of Shrubs Or Small Trees In The Trumpet Vine Family, Bignoniaceae. Winter Hardy To Usda Zones 10-11 Where It Is Best Grown In Fertile, Organically Rich, Medium Moisture, Well-Drained Soils In Full Sun. In St. Louis, Grow Plants In Pots/Containers That Are Overwintered Indoors In Bright Sunny Rooms As Houseplants.