Perrin6363
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I am going to cook my 1st batch of living soil soon. I am going to follow Coot's recipe and I've got Malibu BU compost. I've got enough compost and castings to cook about 15 yd³, I was going to fill a 2x4x 18" bed. I did find lava rock at a local landscape supply place and I can crush it up by hand but I would need roughly 5 ft³ worth and that's a lot to crush by hand. I know there is vermiculite and rice hulls but I've never used them. I've never used lava rock either though, for that matter. What would you use in my situation?