Most Gardenias only bloom once a year in the springtime. The exception to this is the Tahitian Gardenia (Gardenia taitensis). This Gardenia blooms on and off throughout the year. It is a sprawling plant, with dark shiny leaves similar to most Gardenias. It is fragrant like all of the Gardenias as well. Richard Lyons Nursery has the double flowering variety ‘Heaven Scent’.