[Tobra]

I put steer and chicken manure out and till it in a few months prior to planting, also have a compost heap. If there is organic material it will attract worms, which will tend to improve the soil. I also dump water from my fish tank out there, which is full of fish poop. Seems to help.

Depends on what sort of plant you are talking about. There are commercial fertilizers you are supposed to use 2-3 times a year for the citrus in the ground, more often if in container, roses and stone fruits like the citrus fertilizer too. Roses also like epsom salts, magnesium sulfate

I use miracle grow on the vegetables, usually mix more diluted than label recommends. Rotate crops, nitrogen fixing plant in the mix, snap peas this year, tomatoes, peppers. Volunteers this year, tomatillo of course and squash, butternut maybe

Have chives, basil and cilantro. I hate cilantro, but the wife likes it, no accounting for taste. Never had any luck growing that nasty stuff in the past, turns out it does not like full sun.