Crucifixion Flowers on an Easy Annual Climber! These flowers look like hot-house specials, but are actually very simple to grow in full sun. The tropical vine — hardy zones 8-10, superb as an indoor houseplant during winter farther north — grows rapidly, following the blooms with handsome, oval orange-yellow fruits. Climbing shrubby plant with numerous branches, reaches considerable height, has characteristic multicolored flowers. Passionflowers have beautiful and in most cases perfect flowers of five-parted calyx and corolla and with filaments arising from the base. There exists over 500 species of those woody climbing vines, which are cultivated for their beauty and edible fruits. It can be trained and grown in pots in the conservatory or greenhouse or planted outside where it is hardy in many areas. 15 seed