The coriander is a olericultural plant used as spice. However, coriander seeds present
problens of germination, dormency and vigour. The effects of growth regulators and its interactions on
germination, vigour and dormency surpassing were evaluated. Seeds of coriander cv. Palmeira Nacional
were sowed in gibberellic acid (GA3), 2-chloroethyl-phosphonic acid (CEPA, and GA3 + CEPA solutions
with concentrations of zero, 50, 100, 150 and 200mg/kg, during 24 hours. The growth regulators stimulated
germination and emergence. increasing the dry matter and fresh mass accumulations. All of these
increments were a function of the growth regulators concentration. The GA3 in the dose of 200mg/kg
promoted a total seeds germination (100%), in contrast with the control that it showed low seed
germination (17%). The GA3 was much more effective to induce germination than CEPA. Only seeds
treated with GA3 reached total emergence, the concentration of 50mg/kg was enough to induct 100% of
emergency. While the control seeds achived 17%, the seeds tretated with CEPA on the maximum dose
(200mg/kg) reached 49% and the seeds treated with GA3 + CEPA on the higher concentration (200mg/
kg) attained 87% of emergence.