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I am in Perth, Western Australia which is one of the Mediterranean climate zones in the world.

We have no "soil" just a courtyard and planter boxes on our front balcony but I grow a range of edibles in containers

Many herbs - rosemary, thyme, basil, oregano, parsley etc, Strawberries, Lemon grass, Chillies, Many citrus including quite a few native Australians, Pomegranites, Banana, Blueberries, Potatoes and sweet potato, Eggplant and few others.

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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?

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.

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