Good morning. So i have very kindly been given some coffee grounds for free from my loval cafe but as i have never used them before on my flowers and fruit and veg i am not sure what they are good for and what theu might kill.Good morning. So i have very kindly been given some coffee grounds for free from my loval cafe but as i have never used them before on my flowers and fruit and veg i am not sure what they are good for and what theu might kill. I also have some patches of quite clay like soil and wondered if it would be good to mix some in to helo the soil before planting this year? Thanks