5-1-1: OK to substitute granite for perlite?

the_yard_guy(6A)May 1, 2014

Good evening everyone. I'm getting ready to mix up some 5-1-1 over the next few days and have a question.

I have fresh pine bark (1/2" and smaller) with a significant amount of pine bark fines (1/8" to dust), so I won't be adding any peat to this new batch of 5-1-1.

My question is, can I substitute granite for the perlite? I have a large bag of Manna Pro Poultry Grit, which is crushed granite, and I'd like to use it in the 5-1-1 mix. I think it would work the same as perlite, but add additional weight to the mix. I don't see any reason not to use granite in the 5-1-1 mix since it's only 1 part of the mix.

Any thoughts on this, either good or bad?



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tapla (mid-MI z5b-6a)

An increase in bulk density and a slight reduction in water retention are likely to be the only things you'll note if the exchange is volume for volume.


    Bookmark   May 1, 2014 at 9:49PM
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LOL, I was thinking about the same thing. I'm curious as well.


    Bookmark   May 1, 2014 at 9:51PM
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Thanks for replying to my questions. You are a great source of wisdom and knowledge.


    Bookmark   May 3, 2014 at 8:28AM
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