10 YELLOW GLOXINIA Incarvillea Delavayi Chinese Trumpet Flower Seeds *Comb S/H BLOOMS: Spring HARDINESS ZONE: 3 - 8 PLANT HEIGHT: 12 - 48" . . . PLANT SPACING: 12" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average Gloxinia has large trumpet shaped flowers and ferny foliage. They have a great tropical appearance but are very cold hardy. Gloxinia is great because its flowers bloom before the foliage emerges in the spring, so it is very showy!