You might be able to grow olives and black pepper corns in your climate, but salt-now that can be worth it’s weight in gold. I try to buy a box of pickling salt every other week, and on the off week, if I have the money I buy some table salt or sea salt.LOL
I can't grow black pepper corns here. Salt, I can get locally, if required. It's a pain to leach it out, but it can be done. I have plenty on hand, though. I think I've still got a 50 lb salt lick out in the shop. ;)
johnny