Ohhh thats a tough one, there is a chance that pollen could possibly get windblown from one plant to another.. if, big if here, you foliar spray them, this would remove any loose/steay pollen that migh cross fertilizer the other plants.. tread carefully with vegging plants( are these autos).. its better to finish whats been pollinated, then thoroughly clean everything, and i do mean everything.. take no chances