zone 6 is northeast corner of arkansas by mo. border it does get a bit below freezing i think I will try my motto is if they live they live if they die they die but more concerned they they might be something popping up all over my garden ) :
this answers my wondering if they would freeze out here
Esperanza plants, or Tecoma stans, are heat-loving, yellow flowers in the begonia family. The yellow trumpet flowers grow in showy clusters. Its green foliage looks similar to that of the elderberry. The esperanza plant is not cold-hardy, so it should only be planted in USDA hardiness zones 7 through 11. Seeds can either be obtained from local nursery centers or from drying out the seed pods of another esperanza plant and cracking open the pods. Seeds should always be stored in a cool, dry place until ready to use. Does this Spark an idea?