Journal of Ornamental Horticulture

An investigation was made to assess the effect of foliar spray of nutrients and growth regulators on growth, yield and quality in Dendrobium orchid cv. Sonia 17. The growth parameters like plant height, number of leaves per plant, leaf area, number of shoots per plant, number of pseudobulbs per plant, number of back bulbs per plant, shoot diameter and internodal length and number of keikis, the floral parameters like days to flower bud initiation, number of spikes per plant, spike length, number of florets per spike, floret size, spike longevity on plant, pedicel length and post harvest vase life recorded the highest value in the treatment which received NPK nutrients of 20: 10: 10 at 0.2% (T₆). The investigation revealed that the foliar application of NPK 20: 10: 10 (0.2%) at weekly intervals improved the growth, yield and quality. However, foliar application of NPK combined with growth regulators viz., GA₃ 200 ppm and BA 400 ppm did not had significant effect on growth and flower production of this orchid species.