Besides investing in facilities and equipment, Lin knew that in order to get a high success rate of germination and produce healthy 3-4 centimeter high seedlings after 20 days (which is what is required for them to be saleable), the key was still in the soil used as the growth medium.
除了投資設備，要讓種子發芽率高、20 天後長成 3-4 公分高的健康幼苗賣出的關鍵，還在介質土。