Can I use my ground coffee dregs on indoor plants, watered down of course, or just outdoors on all my garden plants ? Or shall I throw them on the compost ?
I dont think coffee grounds have much nutritional value and may go mouldy indoors.
Apparently slugs have an aversion to caffeine, so I'd say yes put it around your prized plants or the compost.
Good Luck.
I always put coffee dregs around my acid loving plants - azaleas, rhododendrons and camelias love them! You can put them in your compost bin but masses of coffee will make it more acidic.