Propagation of a new tree while still attached to the parent tree .
Air-layering is good for creating a larger tree and for creating a better nebari or shortening a too long trunk on an existing tree.
|Brazilian Raintree - Pithecellobium tortum|
|Japanese Maple |
|Japanese cedar - Cryptomeria |
in a Rooter Pot
|Buddhist pine, Chinese Yew |
|Ulmus x hollandica|
Elm 'Jacqueline Hillier'
Creating two trees from a too long trunk
- With a sharp knife, make two parallel cuts about 1 1/2 inches apart around the stem and through the bark and cambium layer wide enough to prevent the callus from linking and remove the ring of bark leaving the inner woody tissue exposed.
- Place a rooter pot or create a temporary container starting a few inches below the girdle and ending atleast an inch above the girdle.
- Dust the wounded stem with rooting hormone.
- Fill the “pot” with a moist rooting medium.
- Keep the soil moist.
- After the new roots are visible on all sides, the rooted branch may be removed from the parent plant. The rooting time will vary with plant variety as well as the season in which it is performed.
- Plant in a growing pot and place guy-wires to secure the top of the new tree until the roots are strong enough to anchor the tree.
- Keep the plant under a light shade and avoid direct sunlight until the new root system is well developed.
Air layering for difficult-to-root plants (Fact sheet - Texas Agricultural Extension Service)
American Horticultural Society Plant Propagation: The Fully Illustrated Plant-by-Plant Manual of Practical Techniques
The Reference Manual of Woody Plant Propagation: From Seed to Tissue Culture, Second Edition