I think the Japanese "pumice" which is actually a type of clay, is Kanuma (the one that is almost white when dry, orange when wet). There is also Akadama, another type of clay, that is darker. Often theyr'e mixed. Both are used a lot with bonsai. Kanuma is slightly acidic, Akadama is neutral.
I think that sinense does grow more like the "standard" Cyms in terms of temperature. Not as heat-tolerant, but is cold-tolerant. ensifolium grows warmer. I think that for most, you will have to worry more about protecting from summer heat than winter cold in Texas.
|