YG & JK
The organic rice hulls that are available at my usual supplier come out of California - Lundberg Farms specifically.
Like JK said - they're certainly cheap enough. I charred a couple of cubic feet and I'm adding it to my potting soil mix. Like JK noted - a good item to use for bio-char since you don't have to break anything up when it's done 'cooking' as such.
RE: pyrophyllite clay - I got mine from a pottery supply house. Their specific product comes out of North Carolina which is one of the few organic sources according to what I was able to determine but I could be wrong of course. I bought 10 lbs. for $7.50 and I'm adding about 1/4 cup to 1 c.f. of potting soil.
CC
The organic rice hulls that are available at my usual supplier come out of California - Lundberg Farms specifically.
Like JK said - they're certainly cheap enough. I charred a couple of cubic feet and I'm adding it to my potting soil mix. Like JK noted - a good item to use for bio-char since you don't have to break anything up when it's done 'cooking' as such.
RE: pyrophyllite clay - I got mine from a pottery supply house. Their specific product comes out of North Carolina which is one of the few organic sources according to what I was able to determine but I could be wrong of course. I bought 10 lbs. for $7.50 and I'm adding about 1/4 cup to 1 c.f. of potting soil.
CC