Diatomaceous earth, vermiculite or Pro mix BX

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The community garden where I volunteer is going to be starting seeds in the next week or so.

We have used Pro Mix Bx in the past with good results for starting and doing the pot up stage.

I have had great success with DE.

One of the gardeners wants us to get just plain old vermiculite. That is what she has had good results with in the past.


Any opinions here on which one to use?

Ease of use, storage of leftover to be carried over for the entire year or more would be factors as well as cost.

Also we are starting our small ebb and flow hydroponic set up this year. I have started some sample cubes of rockwool pak choi and so far I really like this product. Would this be an option to start the seeds and then just pot up this easy to handle cube into the next stage or even directly into the beds?

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