The Effects of Colchicine Concentration and Length of Immersion on Cutting Growth of Patchouli (Pogostemon cablin Benth)

: The aims of the study were to determine the concentration of colchicine and the best immersion length for the growth of patchouli cuttings. This study used a Randomized Block Design (RBD) 4 x 4 factorial pattern with 5 replications, the factors tested were: Colchicine concentration consisted of 4 levels (C0: Without Colchicine, C1: 0.25% Colchicine, C2: 0.50% Colchicine and C3: 0.75% Colchicine) and immersion length consists of 4 levels (R1: 2 hours, R2: 4 hours, R3: 6 hours, and R4: 8 hours). This research conducted in Sigli - Pidie Regency, Aceh-Indonesia from May to July 2016. The colchicine concentration affected the height, leaf area, and number of patchouli branches. Length of immersion give a different response. There was an interaction between the concentrations of colchicine and length of immersion in plant height, but there was no interaction on leaf area and number of patchouli branches.