Impact of Plant Growth Regulators on Growth, Yield, and Quality of Broccoli (CV. Palam Samridhi) in Sub-Tropical Garhwal Hills

This experiment was conducted at HNB Garhwal University, Uttarakhand to evaluate the effects of various plant growth regulators on growth, yield, and quality parameters of the Broccoli cultivar Palam Samridhi. The study revealed that the combined application of Indole-3-butyric acid (IBA) and kinetin at concentrations of 50 ppm and 20 ppm, respectively (T12), significantly enhanced plant height, central curd weight, yield per plot, yield per hectare, total soluble solids (TSS), and chlorophyll content. In addition, the maximum plant spread was observed with the application of Indole-3-acetic acid (IAA) at 100 ppm (T2), while the highest leaf area was recorded with the treatment IAA + IBA + kinetin at 100 ppm + 100 ppm + 10 ppm (T16). The control treatment (T19) consistently showed the lowest values across all growth and yield parameters. Overall, the cultivar Palam Samridhi demonstrated optimal performance with the application of IBA + kinetin @ 50 ppm + 20 ppm (T12), indicating its potential for improved yield and quality under appropriate hormonal treatments.