I think the sweet spot for most hybrids is to start the females first and then put the male in 7-10 days later.
I’ve don’t it all sorts of ways and I think it’s always better to flower a little to early then too late. Some males don’t kick right in to flower so you can get burned with some strains if you wait to long and end up with lots of immature seeds.
I’ve always had great runs just flowering them all together and leaving the male in until at least week 4 of flower
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