This study was conducted to determine the effects of salicylic acid (SA) and proline (PR) applications on the growth and development of green onions. The experiment was carried out according to a randomized block design in an unheated glass greenhouse at Van Yuzuncu Yil University. Proline (50 ppm and 100 ppm) and salicylic acid (0.5 mM and 1.0 mM) were applied individually and in combination. Plant height, root length, stem diameter, number of leaves, total fresh and dry weight, and SPAD values were examined. The highest plant height (27.26 cm) was obtained with the PR2+SA1 combination, surpassing individual treatments. PR1 (16.57 cm) and SA2 (16.03 cm) yielded the highest root length; PR1+SA1 (5.62 mm) had the greatest stem diameter; PR2+SA1 (146.67 g) and PR1 (142.00 g) provided the highest fresh weight, whereas PR2+SA1 (19.84 g) led to the maximum dry weight. The highest SPAD value (89.73), indicating chlorophyll content, was recorded with SA2 application. The findings reveal that combinations of PR and SA positively influence green onion growth and may increase yield, suggesting further studies on optimal doses under grower conditions are warranted.