1. A method of inducing early flowering and/or repressing short day induced growth cessation in a perennial plant comprising: (A) expressing a heterologous nucleic acid encoding a PFT polypeptide within cells of said perennial plant; or (B) expressing a heterologous nucleic acid encoding a PFT polypeptide within cells of a second perennial plant, and; grafting all or part of said second perennial plant onto said first perennial plant, wherein said graft induces early flowering and/or represses short day induced growth cessation in the first perennial plant.