In order to determine the inhibitory affect that Paclobutrazol may had over chrysanthemum, under greenhouse conditions one or two foliar sprays, four dosages (25, 50, 100 or 200 ppm ai), were applied to tree potted cultivars, in other experiment, 0, 12, 0.25, 0.50, or 0.60 ppm ia, were root drenched once. Foliar sprays induced no differences among cultivars, but there were differential responses among dosages and number of sprays. A direct relationship was found between the amount of the product and the stern shortening. When drenched, the product slightly stimulated growth, although without difference with the control. The best conformation of the pots was obtained whan foliar sprayed once, 100 ppm al (25 ml·litro^-1 commercial product).

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