Starbucks coffee and the worm bin!

hummersteveOctober 26, 2013

Ive only been VC composting since april of this year. Things are going pretty well but I was wondering how everyone feels about adding SB grounds and how much and how often to add. I use 9gal plastic tubs 24x17x7". I also like to run all my food scraps mainly veggie and fruit thru my juicer and give them the pulp and they go thru it that way pretty quickly. I also add crushed egg shells, corn meal and watermelon rinds which they seem to love.

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sbryce_gw

Coffee grounds are OK, but like everything else, you can over do them. They tend to do better after they have aged long enough to develop a white fungus on them. You can be pretty generous with them, as long as you are also feeding other things. I would mix them with the other food scraps, up to 1/2 of the mixture being coffee grounds, and see how the worms respond.

    Bookmark   October 26, 2013 at 6:55PM
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Boukmn(10b)

I agree with sbryce that you should let the coffee grounds get really moldy first before adding them to your bin. I have noticed that even in relatively low amounts, coffee grounds begin to drive worms out of the culture. This behavior persisted for 6 days till I added a layer of horse manure and sifted compost to the surface. I suspect the raw grounds are very acidic and mold action neutralizes the pH.

I no longer add raw grounds or kitchen waste directly to my worms. The risk of upsetting the system is too great. Now, I choose instead to add grounds/kitchen waste to my compost pile first. Then, later adding sifted compost to the worms.

    Bookmark   November 26, 2013 at 2:35PM
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equinoxequinox

"I no longer add raw grounds or kitchen waste directly to my worms. The risk of upsetting the system is too great. Now, I choose instead to add grounds/kitchen waste to my compost pile first. Then, later adding sifted compost to the worms." You may have a point there. We may all be trying to do something that should not be done. The big operators grind and sprinkle a layer that probably includes more bedding. Does anybody know how often a new sprinkle is added and how deep it is? Or how deep the bed already is?

    Bookmark   November 26, 2013 at 9:32PM
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hummersteve

Thanks everyone for your comments. I have read that most of the acidic nature of used grounds is already out in use by humans. I have added starbucks plus my daily home brewed grounds without any effects noticable. I will add that I do add crushed egg shells on a fairly regular schedule as I use them.

    Bookmark   November 27, 2013 at 11:46AM
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