Thanks John for the detailed instructions! And now you all know where I got this monster from

) And John? There are even bigger ones?? Wow! This one is plenty big for me lol
John, any particular location? I have full sun areas, a small area with 30% shade cloth, and a north side that gets at the most, an hr or two of direct sun, the rest in total shade and not a lot of air movement there too.
I've been using for substrate, 1 part Turface, 1 part grit and 1 part lava and charcoal. Now that I've been watching how fast they dry out, I'm thinking of changing to 2 parts Turface, 1 part grit and 1 part lava and charcoal. What would you recommend?
Oh, and one last question, does it matter the size whole I drill for drainage as long as they are spread out evenly on the bottom of the tub?...like is it better to have say 1" whole every 6" or so, or 1/2" every few inches? (I've been wondering about this a lot as I've been potting up trees in wooden boxes this spring)