20 GOLDFISH PLANT Columnea Gloriosa Flower Seeds BLOOM TIME: All Summer HARDINESS ZONE: 10 - 11 (or as a houseplant) PLANT HEIGHT: 6 - 12" . . . PLANT SPACING: 36 - 48" LIGHT REQUIREMENTS: Light Shade . . . SOIL / WATER: Average The Goldfish Plant makes an excellent house plant. Kids love them too because the flowers look just like little goldfish!