The study, conducted in a lath house in the autumn of 2022–2023 at the College of Agriculture, Al-Qasim Green University, Al-Qasim, Iraq, determined the humic acid effect on the vegetative growth of the rosemary plant (Rosmarinus officinalis L.). The experiment included two factors: the first factor was pinching, where half of the plants received pinching and the other half was without pinching. The second factor was adding humic acid at concentrations of 0, 4, and 8 ml/L and spraying with kinetin at concentrations of 0.50 and 100 mg/L. The experiment layout was in a randomized complete block design (RCBD) with factorial arrangement (2 × 3 × 3) and three replications. The triple interaction treatment of pinching, humic acid at 0 concentration, and kinetin at 0 concentration gave significant highest values for plant sprouting (29.67 cm). Meanwhile, for the concentration of 50 mg/L, the number of vegetative branches is 5.33 branches plant-1, and the treatments (P1), humic (8 ml/L), and kinetin (50 mg/L) gave the topmost values, significantly affecting the traits, stem diameter (5.98 mm), and the number of leaves (696.00 leaves plant-1).
Rosemary plant (R. officinalis L.), pinching, humic acid, kinetin, sprouting, branches per plant, stem diameter, number of leaves
The triple interaction treatment of pinching P1, humic acid at 0 concentration, and kinetin at 0 concentration significantly gave the highest values for sprouting (29.67 cm). Similarly, the concentration of 50 mg/L resulted in the number of vegetative branches at 5.33 branches per plant in the rosemary plant (R. officinalis L.).