An investigation on “Effect of bio-regulators on vegetative parameters of Asiatic lily var. Pavia under protected condition” was carried out at Department of Floriculture and Landscape Architecture, College of Horticulture, Mudigere (Under University of Agricultural and Horticultural sciences, Shivamogga), during 2018-19. The treatments comprised of, GA3
(100, 150 and 200 ppm), BA (150, 300 and 450 ppm), NAA (100,150 and 200 ppm) and CCC (1000, 1500 and 2000 ppm) and control. The results revealed that GA3
@ 200 ppm recorded minimum days to sprouting (3.33), maximum plant height (98.44 cm), number of leaves (80.93), leaf length (12.53 cm), leaf breadth (2.77 cm), leaf area (1704.60 cm2
) and leaf area index (LAI) (5.68). The maximum number of days for sprouting (16.67), minimum plant height (21.93 cm), minimum number of leaves (31.77), minimum length of leaves (4.27 cm), breadth of leaves (1.37 cm), minimum leaf area (442.45 cm2
) and minimum LAI (1.47) was recorded by BA @ 450 ppm. NAA @ 100 ppm recorded maximum chlorophyll-a, chlorophyll-b and total chlorophyll content (98, 0.50 and 1.48 mg per g fresh weight, respectively). Whereas BA @ 450 ppm was recorded minimum chlorophyll-a, chlorophyll-b and total chlorophyll content (0.63, 0.22 and 0.85 mg per g fresh weight, respectively).