jfecme

Ever since I got started in this hobby I have used tuface withpine bark and granite gravel for my soils. Generally I mix it up in 1:1:1 mixture add alittle this or that when potting up a tree to get the mix right for the type of tree.

Turface has always been relatively expensive, and seems to be getting moreso..
I have seen a recommendation for using amorphous diatomaceous earth which can be purchased for NAPA parts stores in 25 lb. bags. 50 lbs costs about 55% of the turface price.

Now, my question is what proportion should my standard mix be? Should I stick with 1:1:1, adjusting it as needed for deciduous, evergreens, etc? Or should the standard mix have a different ratio? And, if it should what would you recommend?

I ask this question because I expect that diatomaceous earth and turface have different absorbtion and retention rates.

Thanks in advance for any help you can provide.

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Over 25 years experience - good and bad, and still learning!

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