I got some of the last blockhead beans offered up a few months ago and popped 6 and ended up with 5 females and 1 male. The flowers have not opened up on the male yet but there are clusters that are almost ready to open. He's in a room with the BH girls and some ISS and chemo. I would like to make some crosses with this BH male but don't know how without pollinating the whole room. Whats the best way to selectively pollinate a couple flowers without the whole room going to seed?