I wished I wrote that down but don't exactly remember the exact date but it was about 6 months ago or so. I have 3 females and put the male in with each female for a couple weeks at a time and provided the male a couple weeks rest between breedings with each female. I keep male tree vipers nearby the females caged separately for months if not since birth and when I put them together they lock up right away. I did the same with my trigons and one of them is showing to be gravid and the other was locked with the male all last month so I hope she took also.
Dan