苏铁又俗称铁树,为裸子植物中的古老种类,目前栽培十分普遍。在北方盆栽的苏铁由于环境条件的限制不常开花,但在我国南方,尤其是华南等地,十几年以上树龄的苏铁,可以每年开花,很适合用种子繁殖。方法如下。一、采种时间一般在11～12月,最好在12月份,此时种子较成熟。采得早,种子出芽率低;采得晚,种子易脱落丢失。种子采收后,先放在室外阳光下晒3～4天,干后用沙布袋装好吊在室内较高的通风处。 Cycas, also known as Tieshu, is an ancient species in gymnosperms, and cultivation is very common at present. Potted cycads in northern China do not often flowering because of environmental conditions. However, in the southern part of China, especially in southern China, cycads of more than a dozen years old can bloom annually, making them suitable for seed multiplication. Methods as below. First, seed collection time is generally 11 to 12 months, preferably in December, when the seeds are more mature. Picking too early, the seed germination rate is low; mining late, easy to fall off the seeds. After the seeds are harvested, they should be sun-dried for 3 to 4 days in the outdoor sunshine.