Hi Jojoe, thanks for the welcome!
A quick search about coffee come up with things like this:
“Coffee grounds are rich in nutrients, especially nitrogen. They also have some amount of other nutrients like potassium and phosphorous. Overall, this means that adding coffee grounds to your garden can work fairly well as a fertiliser. Coffee should be spread in a thin layer, rather than being clumped in one place.”
As mine is very diluted, after a good amount of rain showers I will use a watering can of it to replace goodness that has lost. I rarely do neat coffee grounds but some suggest as slug repellant but not guaranteed. I found the copper tape rubbish.
I was listening to Gardeners Question Time some months back and one of the experts recommended food shop coriander seeds too as you get 1000’s in a jar compared to packet.
I have a lot of herbs: English Mace, Marjoram, Coriander, Parsley, varied Mint, Sages Bayleaf, Tarragon, Rosemary, Thyme, etc
But don’t really do cooking so I’m a bit rubbish at the need to crop to produce more system.