I have been using spent coffee beans excessively with a number of plants, and they work wonderfully well, but it recently occurred to me that coffee beans may be a bamboo growers best friend. The used beans offer a large amount of nitrogen and are rich in other nutrients, and improve the quality of soil. They can be applied heavily to the top of soil for use as a winter mulch, and attract tons of earthworms.

This is speculation at this point, but I will be trying this with my bamboos, and will report any changes. Unless someone has more experience and this is an absurd and stupid idea, I shall attempt it. On the other hand, coffee grounds are great added to compost heaps or for general soil improvement. If you are lucky enough to live near a Starbucks, then you can ask for bags of used grounds constantly. Anyway, any thoughts, opinions, or feedback is more than welcome, and I shall report in with my experience in a few weeks or so.

I think coffee grounds make a great addition to compost or a soil conditioner by themselves. I think they are just a bit acidic but bamboos like a slightly acidic soil anyway, I think, so you shouldn't have any issues. I dump my coffee grounds and other kitchen waste in a pile out of sight behind my Phyllostachys aurea so it will eventually run into some very rich soil there

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God Bless,

Matthew

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Genesis 2:8 And the Lord God planted a garden eastward in Eden; and there He put the man whom He had formed.

If you have beans that have been out, and you are called away or find you don't need them for a few weeks, refreezing is certainly better than keeping them out. I've occasionally had to chuck such refrozen beans, but mostly they've been fine.
There is no free water in either roasted or green coffee, so freezing does not tear up the internal structure with crystallization as it does with soft foods. This means refreezing causes no extra physical damage; although I'm guessing the warming and cooling causes some slight degradation in other ways.