For developing a system of promoting the enlargement growth of agricultural and horticultural crops selected from fruits, fruit vegetables and flowers, an agent of enlarging the enlargement growth of agricultural and horticultural crops is prepared, the agent comprising gibberellin and a cyclohexane derivative of the following general formula (I): [in the formula, R represents hydrogen, C 1 -C 6 alkyl group, C 1 -C 6 haloalkyl group, or phenyl group (which may optionally be substituted) R1 represents hydrogen, C 1 -C 6 alkyl group, C 3 -C 6 cycloalkyl group, or benzyl group (which may optionally be substituted)], or a salt thereof (for example, a calcium salt) as the active ingredients.本發明係開發一種由果實類、果菜類、花卉類選出之農園藝作物之肥大生長促進系統。本發明之解決手段係以赤黴素(gibberellin)與下述通式(I)所示之環己烷衍生物或其鹽作為有效成分所成之農園藝作物之肥大生長促進劑。(式中,R表示氫、C1~C6烷基、C1~C6鹵烷基或苯基(視需要經取代),R1表示氫、C1~C6烷基、C3~C6環烷基或苯甲基(視需要經取代))。
