Originally Posted by GreenFin

I was thinking that each subsequent p-stem would still take around 18-21 months from inception to harvest, but that if you could get a good 2-pup rotation going, you'd get a harvest every 6-7 months. (i.e. when mother is being harvested at 18-21 months, older pup is at 12-14 months and younger pup is at 6-7 months).

That's just my impression, though. I don't know for sure.