In order to obtain the best growth, flowering traits and chemical constituents of solidago (Solidago canadensis) plant, two field experiments were established during two summer consecutive seasons of 2022 and 2023 in the Experimental Farm of EL-Quassassin Horticultural Research Station, Ismailia Governorate, Egypt. Eight treatments of this experiment were applied which consisted of control (sprayed with a distilled water), sodium nitroprusside (25, 50 and 100 mg/l) and gibberellin (50, 100, 200 and 300 mg/l). The obtained results showed that exogenous sodium nitroprusside (SNP) or gibberellic acid (GA) five times per season significantly improved solidago plant growth and productivity compared to control. In addition, utilizing of gibberellic acid at 200 mg/l effectively enhanced the plant growth (plant height, stem diameter, number of branches per plant and fresh and dry weights of herb per plant), flowering traits (fresh and dry weights of flowering stem per plant and flowering stem length) and some chemical constituents (chlorophyll a and b, nitrogen, phosphorus and potassium percentages) compared to the other treatments under study. Whenever, the highest volatile oil percentage was noticed when sodium nitroprusside at 100 mg/l was used in comparison with the other ones under study. In general, GA especially at 200 mg/l as well as SNP especially at 100 mg/l can be used as a regulator to enhance the growth and productivity of solidago plants grown under Ismailia Governorate (sandy soil) conditions.