I imported 2000 P.tora. microcarpa seeds in september last year. Para.s germinate very well if left long enough, I am still finding germinating seeds in a 8-year sown pot. I know that they can be hastened to germinate by cracking etc, but this technique can easily lead to loses. As importing seeds into NZ can be a major hassle I decided to experiment with stratification instead, assuming a high germination rate eventually is more valuable than a lower final percentage in a shorter time frame.