Open Pollination In A Tent

Letting one male loose among several females gives you a mixed seed batch rather than a defined cross, which suits population work more than a clean breeding project. You lose the ability to say which mother produced what unless you tag everything carefully. Descriptions of open pollination versus controlled single crosses are covered at https://breederregularseeds.com. The main practical issue is that the pollen ends up everywhere, including in flower you meant to smoke.