I used some airports last year for a couple apples from seed (my son wanted to plant them) and for a few peppers. They pruned the roots well. We almost lost the apples while we were on vacation though... a week without water in the Texas summer will kill just about anything. They are still alive in the ground, just barely. No attention since they went in the ground last November. I couldn't believe they lasted at all and I attribute it to the pots air pruning so well.