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Example Air-layer: Acer palmatum
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This Acer palmatum branch will be used to create the air layer.
It is late May and the Spring leaves on the Parent tree have just started to harden off, so it is time to make the air-layer.
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A strip of bark is removed just below an old leaf node. After the bark is removed, all of the green cambium layer below it is carefully scraped away; any cambium left could make the layer fail by allowing the tree to bridge the ring-bark.
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The area is dusted with rooting hormone, wrapped with sphagnum moss and held into position with a clear plastic bag.
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Six weeks later and the new roots have appeared in the bag. At this point, care must be taken that the sphagnum moss is kept damp.
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Another couple of weeks are allowed to pass whilst the new roots strengthen and then the air-layer is separated from the parent tree
