How does one have an organic compost garden without having to use any store bought fertilizer? is this enough?

purchase natural garden fertilizer you ought to keep an eye on:
Query by B: How does a single have an natural compost garden without getting to use any store bought fertilizer? is this sufficient?
I have a garden about 8ft lengthy, 5ft wide.

Over winter (and into late winter/early spring) I have been composting lots of fruits.

Compost -Possibly about 300 or so banana peels, a dozen apples/lots of oranges/ some lemons and limes/ package of strawberries/ potato skins/ really little amount of

Food Vegetable Garden