[programjoe]

You mentioned not having soil, are you using store bought fertilizer or something else? Do you need to deal with adding any chemicals to grow things?

[airbreather]

I use potting mix from the hardware store.

Because it is hot and dry I have to over water, this leaches out nutrients so I have to feed quite regularly, slow release pellets and fish emulsion with a bit of worm juice.

Additionally for the citrus have to add iron chelates because the leaves get yellow from deficiency otherwise.