jjeter

Another area to consider is soil breakdown. You might be able to leave the tree in a larger pot for a couple of years more, but if the soil breaks down (including akadama, Turface, etc), you will need to repot anyway. The reason to use a grow box is to improve the health of the tree, not to make it easier on you (not needing to repot when necessary). As one of my former club members says "Do you use a pot, soil, watering regime to benefit you or the tree?"

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Jeff

Student of Bonsai