Ozz80
Yamadori
This spring I bought a medium sized non cultivar Japanese maple tree from a nursery. It was not in the best soil and a few leaves showed signs of underwatering but it was not too much, so I did not bother. I immediately airlayered two of the three main branches (it was 6 weeks ago) while keeping the third branch untouched to supply sugars to the root system and the main trunk. The idea was to reduce the tree in size by airlayers, repot at next spring to a better substrate and while repotting, to check the root system and decide how to progress to create nebari for the main tree (airlayer the main trunk, ground layer or just improve the current root system).
Strangely, branches that are airlayered are stable as they are in the first day (no new shoots but no further browning of the leaves) meanwhile leaves on the branch that is not airlayered are browning and drying at the tips. I am still watering only after the soil is dry, and I recently moved the plant to a more shadowed spot. But I suspect that it will survive when summer heat waves of Istanbul comes.
The first photo with healthy leaves belongs to an airlayered branch. You can see on the third photo that the small shoot just below the airlayer is drying (leaves up on the airlayered branch are healthy). The second photo belongs to the unairlayered one. You can also notice slight chlorosis on some of the leaves. Chlorosis is both on the airlayered and unairlayered branches.
What can be the cause of this problem? Is there anything I can do at the moment?




Strangely, branches that are airlayered are stable as they are in the first day (no new shoots but no further browning of the leaves) meanwhile leaves on the branch that is not airlayered are browning and drying at the tips. I am still watering only after the soil is dry, and I recently moved the plant to a more shadowed spot. But I suspect that it will survive when summer heat waves of Istanbul comes.
The first photo with healthy leaves belongs to an airlayered branch. You can see on the third photo that the small shoot just below the airlayer is drying (leaves up on the airlayered branch are healthy). The second photo belongs to the unairlayered one. You can also notice slight chlorosis on some of the leaves. Chlorosis is both on the airlayered and unairlayered branches.
What can be the cause of this problem? Is there anything I can do at the moment?




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