Bark fines for Gritty Mix
I am still searching for a good source of uncomposted pine bark fines for gritty mix. After researching here on the forum, I ordered a bag of Agway Pine Bark Mulch. I've since received & opened the bag and now have a couple of questions since it isn't exactly what I pictured.
How do I tell if it's composted/uncomposted? It sat outside (semi-shaded) for a couple of days (we had a hot day or two, and then some rain) before I was able to open it and begin the sifting process. I discarded any pieces that felt soft to the touch.
Secondly, I was surprised to see sapwood in the mulch. I'm attempting to sift it out, but the pieces are mostly small slivers. Still, there seems to be a lot of it... I'm not sure how to figure the 10% per volume bit (math and I are not on speaking terms) either.
Suggestions are always appreciated!
Pics of the unsifted bark: