Vegetative propagation by tip cutting can be influenced by factors such as collection time, cutting length, auxin concentration and cutting physiological status. The ornamental Hibiscus (Hibiscus sp.) is commercially propagated by cuttings. Therefore, there is a need to study the influence of these factors on the rooting capacity of this specie. The aim of this work was to evaluate the IBA effect, cutting length and collection time on Hibiscus tip cutting propagation. The experiment was carried out in the plant production sector of the Universidade Tecnológica Federal do Paraná, Campus Dois Vizinhos, Dois Vizinhos, PR (Brazil). The experiment was arranged in a 3 x 2 x 2 factorial completely randomized block, (IBA concentration x cutting length x collection time), with four replications, with each plot consisting of ten cuts. Two collecttion times (June and September), two shoot cutting lengths (6 and 12 cm) and three IBA concentrations (0; 1 and 2 g L-1) were tested. At the two collection times, after 77 days, the rooting percentage, number of shoots and roots per cutting and the length of the three largest primary adventitious roots were evaluated. Based on the results, we can recommend the tip cutting propagation of the ornamental Hibiscus from September on, using 12 cmlong tip cuttings and 1,5 g L-1 IBA.
Vegetative propagation; ornamental species; Hibiscus sp
