Gibberellic acid promotes flower stem elongation in 'Renaissance Red' poinsettia

摘要

Gibberellic acid (GA) used as a foliar spray on 'Renaissance Red' poinsettia (Euphorbia pulcherrima) greatly increased flower stem length without lengthening production time or other adverse effects. A concentration of 10 mg L-1 GA(3) applied weekly for the five weeks prior to onset of short days was most effective.