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The objective of this research was to evaluate the soaking duration of Gibberelic Acid (GA3) on rhizome growth of edible canna. This research was conducted from December 2015 to July 2016 in the experimental field and in the Laboratory of Plant Physiology, Department of Agronomy, Faculty of Agriculture, Sriwijaya University, Indralaya. The method used in this study was Complete Randomized Design consisting of seven treatments and four replications. The treatments were without soaking (control), soaking for 6, 12, 18, 24, 30 and 36 hours. The study used 100 ppm of Gibberelic Acid and a half rhizome. Results showed that by soaking the canna rhizome into GA3 would significantly affect the time of bud emerging, plant height, leaf number, and seedlings number but did not significantly affect the variable level of leaf greenness, leaf chlorophyll, rhizome and plant fresh weight. Soaking rhizome with GA3 increased the time of bud emerging in the treatment at the nursery, plant height and the number of tillers in the treatment 24 hours, and the number of leaves on 12 hours treatment. Soaking canna rhizome with GA3 has the growth ability compared to controls. However, further research is needed with a combination of different growth regulators.

THE EFFECT OF GIBBERELLIC ACID SOAKING DURATION ON RHIZOME GROWTH OF EDIBLE CANNA (CANNA EDULIS KER.)