Do tell me about the coffee grains for planting. Our garden is such a disaster for growing anything, as we have a number of large, very well-established plants in a small space, and they take almost everything.

(I cannot take out a 10m pine tree, 40-yr-old bougainvilliea ditto honeysuckle, and don't want to get rid of the lemon tree or orange tree. There is ivy everywhere in the fences/hedges, and... Well, suffice it to say it's not very fertile.)