Effect of GA₃ NAA and Citric acid on the post harvest life of cut tuberose (Polianthes tuberosa L.) spikes cv. Double

Among the plant growth regulators, GA₃ showed better results as compared to NAA and control. GA₃ at two concentrations (100 ppm and 150 ppm) increased the water uptake, vase life, fresh weight, percentage of opened florets, floret diameter and length of florets. Citric acid at 0.5% was most effective in promoting water uptake, vase life, floret opening, increasing diameter and length of first, third and last fully opened pair of florets, while citric acid @ 0.1 percent was most effective in influencing the fresh weight and length of rachis.