Effect of Gibberellic Acid on Seed Germination of Different Lavender

By soaking with the constant temperature method, the effects of different concentrations of gibberellic acid on seed germination of Lavandula intermedia, Lavandula anjustifolia, Lavandula angustifolia Mill was studied. The results showed that the germination rate was affected by gibberellic acid concentration and varieties. The gibberellic acid concentration of 550 mg·L-1was the best.The germination rate of Lavandula intermedia was better than the other two varieties. By gibberellic acid treatment,the seeds germination, hypocotyl length, radicle length of three species of lavender were better than water, and low concentrations of gibberellic acid was good at radicle growth.