Amending soil with kitchen by products

Question

Can I just whir together my coffee grounds, eggshells and banana peels ( or other fruit/veg) and work into soil en masse?

Is there a limit?

I live in a planned retirement community – no place at all to compost.

Answer 1

Those three happen to be just fine to add to soil as it is. They will break down without too much issue. I would not put much else besides these to avoid a fungal issue. There isn't a whole lot that I would recommend putting in without composting, but you will be fine to use these items.