Seeds from Passiflora alata. This plant grows 30 to 35 feet and is root hardy in zones 8 and higher. It likes full sunshine and a mild dose of potash in the early spring. The flowers on this plant are about 3 inches across and have large maroon petals with purple and blue filaments. This vine produced many of these blossoms during this past summer followed by large fruits about 2 inches across.