Vol. 9, Special Issue 2, Part B (2025)

The present investigation was undertaken at the Model Floriculture Centre, G. B. Pant University of Agriculture and Technology, Pantnagar during 2022-23 and 2023-24. The experiment was laid in RBD with eight treatments and three replications. Treatments include: T_0: Control (No K), T₁: Recommended dose of potassium (K) @ 60 kg ha^-1 after pruning as basal dose, T₂: Nano K, single spray @ 100 ppm at 10-12 leaf stage after pruning, T₃: Nano K, single spray @ 150 ppm at 10-12 leaf stage after pruning, T₄: Nano K, single spray @ 200 ppm at 10-12 leaf stage after pruning, T₅: Nano K, double spray @ 100 ppm 6-8 leaf stage after pruning and 10-12 leaf stage after pruning, T₆: Nano K, double spray @ 150 ppm 6-8 leaf stage after pruning and 10-12 leaf stage after pruning, T₇: Nano K, double spray @ 200 ppm 6-8 leaf stage after pruning and 10-12 leaf stage after pruning. During 2022-23 and 2023-24, among all the treatments plant height (84.81 cm and 83.83 cm), number of branches (19.32 and 17.35), plant spread (81.26 cm² and 76.45 cm²) and numbers of flower per cluster (12.50 and 11.75) was recorded highest in T_7, respectively. However, there was non- significant effect on numbers of petals per flower.