Modification of episodic growth in Skimmia japonica ‘Rubella’ by gibberellic acid treatment

Applications of GA₃ in May/June, when the first flush of growth was maturing, induced an extra flush of vegetative growth and initiated lateral bud break. Flower initiation was delayed and flower size reduced by the GA₃. These responses were only slightly modified by additional sprays with BAP and TIBA. GA₄₊₇ was ineffective in promoting either extra extension growth or lateral bud break, but it did reduce flower size.