Anyone know what soil mix for Climbing Hydrangea? I have seen several nice ones including Bill Valavanis, Rocky Mountain Bonsai Society and one from the collection at the Pacific Bonsai Museum. I was not able to find anything about soil. I have a decent peegee hydrangea thats coming along in 100% akadama but this was more of an experiment.
Curious if anyone on here knows anything on the soil any of these well developed trees are in?