My guideline for edible things to grow is items that are expensive, like Rhubarb at $9/k. Macadamia nuts.
I’d like to plant an Avocado, but getting dwarf plants, ie, suitable for a metro garden is difficult in WA as most growers in other states don’t deliver to WA. Ironically, farmers too want dwarfing rootstock as they don’t want to use cherry pickers to collect the fruit, their experimentation has shown that Ashdot dwarfing rootstock gives great results, but no one supplies such trees to retail traders!
Herbs like parsley, basil, mint, thyme, etc are easy to grow, are great fresh. Plants like onions, boc chow, carrots, spuds, are so cheap why grow them. Toms, can be good, but IMO go for a variety that is good on flavour, not volume, often the older varieties.
I don’t have a need for tree load of limes, so the native finger limes might be worthwhile, hadn’t realised there so many varieties to choose from, anyone recommend one?