Air Layering Hong Kong Orchid Tree
I've been trying to air layer my Hong Kong orchid tree for a few months. I scraped the bark off a limb that needs to come off and wrapped it with foil and mycorrhizae enriched soil. I haven't had it in plastic but put on plastic yesterday to see if it would help. My theory was the foil would keep the branch warm during winter nights.
Is it possible for trees to propagate by air layering while dormant or should I assume that nothing is going to happen until the tree comes out of dormancy? How long should air layering take before roots are established enough that you can remove the limb?
This is my first attempt at air layering.