沙打旺于7月末至8月初开始开花,花期2个月左右,早开的早成熟,晚开的迟成熟。果穗成熟时,荚果的尖端开裂,部分种子会脱落。为了减少种子损失,繁种田应分期采收成熟果穗,第一次约在8月末至九月初采收,以后每隔7～10天采收一次,最后一次采收应在霜后10天左右。 成熟果穗的荚皮呈灰褐色,种子黄褐色。采摘时穗柄尽量留短些,不要带青叶子。将果穗握在手中, Astragalus began to flowering from late July to early August, with flowering of about 2 months, early maturity of early opening and late maturity of late opening. When the ear matures, the tip of the pod cracks and some of the seed will fall off. In order to reduce the loss of seeds, mature farmland should be mature harvesting ears, the first about the end of August to early September harvest, after every 7 to 10 days once harvested, the last harvest should be about 10 days after the frost. The ripe ears of the pods were gray-brown, yellow-brown seeds. Harvest ear handle try to stay shorter, do not bring green leaves. Hold the ear in the hand,