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Over the past 4 years I have had good luck with:
a) Pumice - 100%
b) Pumice and bark - 70/30
c) Pumice and lava - 50/50
d) Pumice, lava and bark - thirds
e) Pumice, lava, bark and oil dry - quarters
f) Pumice, lava and akadama - thirds
g) Pumice, lava and turface - 35/35/30

As long as the mix is free draining and hasn't broken down, the user will be able to fit a watering schedule and fertilizer regimine that fits for their trees, mix and area - and if they have any clue at all their trees will "grow great in that mix". I have seen a variety of trees grow great in all of these mixes, and have come to the conclusion that what works best is what people use the most and have the most confidence in - kinda like fishing - you catch the most fish with whatever you like the best and use the most...

10-Apr-2007	#37
rlist bonsaiTALK Adept Join Date: Dec-2005 Country: USA USDA Zone: Zone 8a AHS Heat Zone: ? Posts: 227	Over the past 4 years I have had good luck with: a) Pumice - 100% b) Pumice and bark - 70/30 c) Pumice and lava - 50/50 d) Pumice, lava and bark - thirds e) Pumice, lava, bark and oil dry - quarters f) Pumice, lava and akadama - thirds g) Pumice, lava and turface - 35/35/30 As long as the mix is free draining and hasn't broken down, the user will be able to fit a watering schedule and fertilizer regimine that fits for their trees, mix and area - and if they have any clue at all their trees will "grow great in that mix". I have seen a variety of trees grow great in all of these mixes, and have come to the conclusion that what works best is what people use the most and have the most confidence in - kinda like fishing - you catch the most fish with whatever you like the best and use the most... __________________ NW Oregon, Zone 8a Check out my new blog here... Both gold and muck come out of the same shaft...