William Bronson wrote: I have made some nice large ones from weed barrier. Just sew a tube out of the fabric and close one end with a ziptie. Put the bottom in a relatively low sided container to contain the water.
Panty hose works for smaller size containers.
William James wrote:These things seem to be the bomb for air layering. Problem is they're expensive if you want to do this en-masse.
I'm also dreaming up ways to do air layering (or pruning, don't know what the right term is), but I haven't had time to do any trials yet.
I have an idea of doing it with 2 small plastic pots and a few zip ties, arranged in a way that accomplishes what the clamshell propagator does. I have lots of these small pots going unused, so it would be great if something could be done with them.
So far, all the air layering techniques I've seen online (with the exception of the above link) all seem really bad design. Either the root ball container is too small (=fewer roots), there is increased condensation in the chamber which may increase fungus or bacteria, or it just looks as if it would be a pain in the rear-end to put on.
There should be an easier way to do this. I have the feeling that ground layering, while not very practical with trees, is a thousand times easier. One solution would be to let a ground-level branch jump out and then put a pot under it and a rock over it.