Yes they do get some airflow. Actually it is a super crappy harvest it is going to be about 2 grams dry. This is why I stopped using coco coir, it just didn't work for me: tiny plants, stunted growth. But I have another plant of the same strain growing to be huge and this is going to give some serious harvest and will be flowering while I'm gone for 2 months, so when I come back will be ready to cut.