Anyone here know the size of Akadama, lava rock and pumice you should you per size of your tree?

rhawes

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I have been using 3-4 mm size, but just bought medium 8-9mm size and think it is too big for what I want, I have various sizes of trees so anybody know is there some rule of thumb to use? per height or trunk size?
 
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I use 2-4 mm in all my trees because that’s the sieves I got. I don’t change with tree size.
 

rhawes

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Thank you Gustavo I think I will just use this large mix for bottom of the pot maybe?
 

Mikecheck123

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It's dependent on your local climate and watering habits. No one can answer for you.

But the most important thing is uniform particle size. Different sizes is counterproductive.
 

Colorado

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For Shohin I use approximately 1/16” to 1/8”

For anything larger I will go 1/8” to 1/4”. Whether or not to leave in the 1/16” on these depends on how much water retaining capacity I’m aiming for. I take it out for trees like Ponderosas, leave it in for trees like deciduous.
 

Mike Corazzi

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Thank you Gustavo I think I will just use this large mix for bottom of the pot maybe?

Careful using it for drainage layer. I think it would degrade and plug up the bottom.
Maybe 50-50 with equal size lava or pumice but I would NOT use akadama as the entire bottom.
(actually I try to keep the stuff from anywhere near the bottom)
 
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