Yhis study was investigated at Agriculture Faculty of Damascus university during the agricultural season of 2012/2013 in order to determine the effect of foliar spray with seaweed extract (5 and 10 g/l) and GA3 (50 and 100 ppm) on the growth and production of local red onion (Baladi) at different levels of irrigation (100, 75, and 50% of field capacity). Onion bulblets were planted in pots and plants were treated when they had 3-4 leaves and every two weeks until full vegetative growth.