When to apply pollen

Hi all gardeners,. I'm trying to breed a few of my own fem seeds. I've done the collodial silver bit and collected a small amount of pollen, a week ago I flipped another plant I want to apply the pollen to, how many weeks into the flowering period is it best to apply the pollen ??

About 3 weeks after pistils have emerged or any time after that. Try to spread pollen after the buds start to look like buttons. There’s no optimal time to do it but you want the buds to be sexually mature while giving plenty of time for seeds to develop.

Thank you very much for the reply,