In order to explore the possibility of improving the quality, productivity and profitability of tuberose (Polianthes tuberosa L.) cv. Prajwal using different plant bioregulators, an experiment was conducted during 2015-16 and 2016-17 at Horticultural Research Station, Kovvur of Dr. YSR Horticultural University, Andhra Pradesh. Five plant bioregulators (Gibberellic acid, Benzyl Adenine, Salicylic acid, Ethephon and Spermidine) each at two concentrations in addition to water spray as control were evaluated in randomised block design with three replications. The results revealed that the foliar sprays of plant bioregulators at 30 and 60 days after sprouting of bulbs, significantly influenced floret quality, floret yield and bulb yield. Significantly maximum length (6.12 cm), diameter of floret (4.34 cm), 100floret weight (210.85 g), floret yield (12.02 t ha -1 ) and bulb yield (11.57 t ha -1 ) was recorded in the plants sprayed with GA3 at 200 ppm over control. The same treatment recorded the highest benefitcost of 3.02.

The present experiment was aimed to evaluate different flower inducing chemicals on flowering of tuberose (Polianthes tuberosa L.) cv. Prajwal at Horticultural Research Satiation, Kovvur, Andhra Pradesh during the years 2015-16 and 2016-17. Experiment conducted with 11 treatments which includes spraying of GA 3 , BA, SA, spermidine, ethephon each at two concentrations at 30 and 60 days after sprouting along with control and laid out in randomized block design, replicated thrice. All the growth regulating chemicals significantly increased the number of leaves clump -1 , leaf area, LAI, blooming period of a spike with increasing concentrations except at high concentration of ethephon over control. Similar trend was followed for spike parameters also. However, days to 50% flowering and days to opening of first floret in a spike were significantly early in GA 3 sprayed plants. GA 3 excelled all other flower inducing chemicals for spike yield per hectare.