yacon rhizomes

i went out back early this morning to harvest some yacon to send to a dear friend...the yacon has done well this year and the plant in the container yielded about two pounds of fresh yacon tubers...along with the tubers there came a number of rhizomes that speak to me of another generation in the next year...i left some on the tubers i sent just in case my friend would like to experiment with growing yacon since they readily grow in containers...there were multiple rhizomes on the root balls and some that popped off during harvest...those i took downstairs and planted about three inches deep under the lights...the yacon rhizomes i planted last christmas day took thirty-seven days to sprout so we won't be looking for any of these until next year.