甜菊从开花到种子成熟需25～30天。成熟的果实和种子称为瘦果,呈褐色或黑褐色,长纺锤形,约长1毫米,顶端着生黄褐色的冠毛,毛长2～5毫米,呈倒伞状开展。种子依靠冠毛可随风飘扬散落。种子成熟后无休眠期,温、湿度适宜的条件下极易发芽。种子寿命的长短也与温。湿度密切相关,如广州市高温多湿,种子仅能保存两个十月:在南京种子可保存一年:建平县小降水量450毫米,年平均气温7.9℃,种子保存14个月,发芽率仅下降11.1％。 Stevia from flowering to mature seed takes 25 to 30 days. Mature fruits and seeds called achene, brown or dark brown, long spindle-shaped, about 1 mm long, top with raw brown coronal, hair length 2 ~ 5 mm, was inverted umbrella. Crested by the wind can fly seeds scattered scattered. Seed dormant period without maturity, temperature, humidity, suitable conditions, easy to germinate. Seed life is also with the temperature. Humidity is closely related to, such as high temperature and humidity in Guangzhou, the seeds can only save two October: seed in Nanjing can be stored for one year: Jianping small precipitation 450 mm, the average annual temperature of 7.9 ℃, seed storage for 14 months, the germination rate Only dropped 11.1%.