You could bring them home and attempt a re-brew -Good for those on a
strict budget!! But, seriously …Why should you use coffee grounds in
your garden?? Coffee grounds provide nitrogen similar to a good compost
of leaves. The acid in the coffee grounds are also good for roses and
azaleas. You can get the coffee grounds from Starbucks for FREE. The
coffee grounds are best to mix with an existing compost so you don't
over acid your garden.