I have been using this technique now for over ten years and I have finally decided to share what I have learned. The technique is known as ‘sweating’ and is used extensively in arboretorial circles. I use for the following species: Cratageus, Prunus, and most of the Rosaceae family, do not use on evergreen species.
I collect trees with as much root as possible, but I have put roots on trees that have not had any.
Follow this procedure and your success rate in establishing your freshly collected yamadori will improve immeasurably.
- Collect as much root as possible
- Clear as much mountain soil but do not wash the roots
- Use the soil mix as shown below
- Clean cut the major roots as close to the trunk without spoiling the nebari
- Place the tree in the smallest container possible
- Ensure that the tree is well packed in the container
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