Male

one boy(removed) and one girl. How long for the males seeds to be useable ?
Just started flower.

What? You need to be more specific.

been in veg 2 months-just showed balls, will it take 8-10 wks to harvest seeds ?

If you let the balls open up first, yes. It shouldnt take that long, prolly 5 weeks.

You'll see the calyxes swelling shortly if it has been fertilized. It won't take long, and it will be obvious if she's prego.

Male cannabis plants do not have seeds nor do they produce any.The male cannabis plant will produce pollen sacs and once they open you can either collect the pollen and apply to a female plant that is flowering (on a bud) or do an open room pollination.It generally takes about 4 weeks for seeds to form.

Thanks, I pulled her last night and left outside(freezing), this AM saw that she was droopy but not dead, planted her in a pot and lo and behold he is alive.
But now I understand that I need a female to get pregnant so I will just let her go.
Thanks for help.

You need both male and female to reproduce anything. Both parents have to be mature and healthy. The fertilized female must be kept healthy if you intend to pass on the genetics you desire.