Effects of Varying Doses and Timing of Humic Acid Application on Growth and Flowering of Zinnia elegans

Aims: The aim of this work was to investigate the effect humic acid, applied at different concentrations and time intervals, on vegetative flowering characters Zinnia elegans.
 Study Design: experiment designed as a complete randomized design with three replications total nine treatments.
 Place Duration Study: conducted Department Horticulture, School Agriculture, Lovely Professional University, Phagwara, Punjab. study carried out over specific duration in 2022.
 Methodology: shaded area, where elegans plants were subjected foliar spraying acid (2.5, 3.5, 5.0 mL/L) intervals (10, 30 10 days both after transplanting) transplanting. Various aspects plant growth, including height, leaf root length, branching, parameters such flower, blooming period, flower size, number flowers per observed.
 Results: results showed that application concentration 3.5 mL/L planting significantly increased plant. Plants treated exhibited highest values for these compared other treatments control (water spary). taken also reduced higher acid.
 Conclusion: findings indicate particularly planting, positively influenced dimensions elegans.