Male plant--use old soil from 5 gallon container?

[Volker]

you may as well throw that male out. They're not good for anything except making seeds if you have females.

Agreed. And then only if yer a breeder and it' a good male. Throw it out. Don't mess with it. Don't try to capture & freeze the pollen. Just throw it away. It`s not good for anything except flavour, and then only if you like the taste of pot jizz.