They are the essential Eucalyptus growing environment (other than the ground!).
You should never buy a Eucalyptus that has not been grown in an Air-pot.
Please note: you do take the pot off before planting or potting on. Do not plant your tree in the ground with the pot still on. The tree is not root-bound (that’s what the pot prevents); you have to unscrew the green screw to release the rootball.
For more information, see our Air-pots page and scroll down to “Why Air-pots?”:
Or, go to their website for a “how to assemble” video: Video.