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 GA3 applied weekly for the five weeks prior to onset of short days was most effective.
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cut flower
Euphorbia pulcherrima
Euphorbia pulcherrima
fleurs coupées
longueur des pédoncules
stem length