Good soil/perlite/vermiculite ratio?

Would something like 75% soil, 15% perlite, 10% vermiculite be good?

Sir72 said:

Would something like 75% soil, 15% perlite, 10% vermiculite be good?

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I think 1/3 base mix should be airation.

Sir72 said:

Would something like 75% soil, 15% perlite, 10% vermiculite be good?

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Depends on what you mean by "soil".

If there is coco coir in that soil, that is also aeration. 10-20% perlite is fine, I personally wouldn't use anymore than that. What you described will be fine; perlite just doesn't really have any cation exchange capacity whereas vermiculite does.

Nullis said:

If there is coco coir in that soil, that is also aeration. 10-20% perlite is fine, I personally wouldn't use anymore than that. What you described will be fine; perlite just doesn't really have any cation exchange capacity whereas vermiculite does.

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I often wondered if the aluminum in vermiculite would ever be readily absorbed?
Perhaps akin to azomite, under really acidic conditions?
Reason I say that is I LOVE vermiculite, but I compost my stuff, so the acidity gets rather extreme during the composting, not to mention the abundance of fulvic and humic acids, that are know to break down aluminum.
If I recall, vermiculite is probably the BEST at CEC

I ended up using miricale grow organic potting soil, perlite, organic dry ferterlizer and dolomite lime.