12-30-2011, 03:57 PM
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I dig it up out of my yard ;) I've also used cat litter (the super super cheap kind)
The cheapest kiln-fire clay would be best... Preferably in red. If it comes in tons of colors, don't buy that brand at all. All-natural clay should be white (grayish) or red (dark red)
If you notice somethwere in your yard that tends to collect water, just dig under it and you should find clay.
I start with a baseball size amount of clay. Let it air dry completely, and crumble it as fine as possible. (helps add water to a thin paste, spread out, and then dry sometimes)
Then add 1 tablespoon CSM+B, 3 packs of plain gelatin, and 1/4 cup slow-release fertiliser pellets (I use osmocote, but osmocote plus should be fine.)
Add hot water, and mix by hand until an extremely thick but moldable consistancy. The less water, the better, but make sure the water is evenly distributed.
Keep them in the refrigerator until you need them. If I was using sterile clay, I'd probably add a little soil to the mix too.