Watering plants near coffee? Hey... I just hear that watering your plants with coffee be...

Hey... I just hear that watering your plants with coffee be good for some plants, and not for others (something in the region of the acidity...), but I want to know if I can hose mine with them. I get these mixed wildflowers from my dad for Earth Day, and I want them to grow lots an lots, so do you think coffee would hurt them?

Thanks!
What plants are really frozen to execute?
Answers:    My dad watered everything next to mom's leftover (put tresses on your chest) coffee.
He did in simply once a week some plants less.. But he did it to every plant within the house.
His ivys just grew threw the together house is was crazy :-)