pollen Sacks or bananas need to burst first from every thing I know and have read and it is a powdery substance that you can see on your hand. Me and people I know keep male mother plants, meaning keeping the male in veg for months on end untill we want some pollen from the strain then we cutt off a clone, flower it out untill it has sacks and collect the pollen. Throughout the veg the male still has his male preflowers and can be in the same cab as female clones and mothers with know problems.
Adieu