I save coffee grounds from OP (along with my tea leaves) for roses and
other decorative plants. He says banana peels are also good for
roses.

Trying to save myself misdirected effort, what is NG opinion:

Need to scratch in and water coffee grounds? Or bury? Or just leave
on surface?

When apply -- in rose's annual cycle.

Need to cut up or grind up banana peels? Same q. as above.

Same q, when apply.

TIA for opinion(s)

HB