Funny bout the snowball... My great uncle used to add lime because he liked the flowers to be a lighter pink... As for the coffee grounds... I make a full pot every morning and add the grounds to the compost... I can't imagine how many pounds of coffee are actually in that bin! And how much $ I saved not going to starbucks every morning... I'm sure the composting changes the grounds chemically in one way or another, plus i add lime to my finished compost, that said I can't help but think that their acidity would have to be balanced out one way or the other for them to have any really positive effect on your figs...