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Question:

Vermiculite vs coffee grounds for mushroom growing?

Anyone know the pros and cons of using coffee grounds to hold water for growing mushrooms?

Answer:

No. Vermiculite is a type of rock that was heated enough to pop into the form you get it. Chances are good all the minerals in it are worthless, and the rock's minerals is the fertilizer for the Lucky Bamboo. Instead go to your closest street and look for tiny pebbles. Collect enough for your container, wash pebbles, and use them. My Lucky Bamboo has been growing for 10 years now. Since we have to wash the little pebbles well enough that the water isn't all gunky, there is no way to keep the original little pebbles. I've been replacing them with pebbles I find in my cement yard. (Probably pebbles used in terra cotta pots that died over the years, so the pebbles escaped. I don't know where we keep coming up with tiny pebbles, and generally find them the hard way - by stepping on them. lol) They need that little.
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