Vinca Pacifica Deep Orchid Xp SeedsVinca Pacifica Deep Orchid Xp Seeds The largest, earliest and most vigorous O. P. vincas are now easier to grow and more appealing at retail. The XP varieties deliver exceptional uniformity, a tight 5 to 7 day flowering window, and superior stress tolerance. Very floriforous, well branched plants show off bright flowers that wont show gaps in hot temperatures. Plant Information Plant Type: Annual Scientific Name: Catharanthus roseus Growing