1/8 inch screened pine fines

joewormMarch 5, 2012

do the pine fines have to be aged or composted or will fresh ground pine fines be okay?

I screened pine fines with an 1/8" hardware cloth. half of what I screened ended up being less than 1/8". the remaining pine fines are an 1/8" to 5/16". Are the resulting pines fines, those less than 1/8" to dust, too small for the 5-1-1 mix? If so, 50% is a lot of waste!!

Can that less than 1/8" to dust be a substitute for the peat in the 5-1-1 mix?

thanks

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DaMonkey007(10b - Miami)

Hey Joeworm,
If fresh is what you can find, that will work just fine.

You can go down to 1/16" without too many problems. Just be aware that the higher the percentage of small particles you have, the higher your water retention will be, and the higher the chances that your mix may perch some water. I personally use:

4-1/2 part pine > 1/8"
1/2 part pine between 1/16" - 1/8"
1/2 part turface > 1/8"
1/2 part turface between 1/16" - 1/8"
1/2 part perlite > 1/8"
1/2 part perlite between 1/16" - 1/8"

You certainly don't have to go about it this way, many people will just use everything > 1/16", however, with this "formula" I ensure that only ~20 percent of the mix is 4 part pine > 1/8"
1 part pine between 1/16" - 1/8"
1/2 part turface > 1/8"
1/2 part turface between 1/16" - 1/8"
1/2 part perlite > 1/8"
1/2 part perlite between 1/16" - 1/8"

If you don't use turface in your 5-1-1, no worries. You can you peat of course, or if your looking to minimize your pine losses even more, just use what DOES pass through the 1/16" screen as a replacement for that fraction of the mix.

Have fun with it!

PJ

    Bookmark   March 6, 2012 at 8:21AM
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