The objective of this research was to evaluate the influence of different substrates and collection season on the herbaceous cutting rooting of 'Paluma' and 'Século XXI' guava plants (Psidium guajava L.). The herbaceous cuttings were obtained on spring and summer seasons, consisted of 10cm of length, two nodes and a pair of leaves in the superior node, and treated with five doses of IBA (0, 500, 1,500 and 2,000 mg/L) for each season studied, and disposed into plastic boxes containing hull rice coal and vermiculita as substrates. After 70 days, the rooting percentage, roots length, number of roots, fresh and dry matter of roots, survival percentage, foliar retention and percentage of cuttings with callus were evaluated. The results showed that the better rooting percentage occurred in cuttings collected in summer; the 1,500 and 2,000 mg/L of IBA were the most appropriate to provide the best rooting characteristics of 'Paluma' and 'Século XXI' herbaceous cuttings, respectively. Both substrates are indicated for the guava cultivars herbaceous cuttings rooting studied.
IBA; mist chamber; Psidium guajava L
