Bai Guo or Ginkgo nut is harvested in the autumn and has a pale yellow colour to it. Ginkgo nut is sweet, bitter and neutral, and with mild toxicity in nature. It is often used to help asthma and coughs with phlegm. Bai Guo contains glycosides and ginkgolide which can help improve circulation. All Phoenix Medicial dry herb and concentrated herbal granules are grown without sulphur, pesticides or herbicides and are grown in the place of origin.