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I wouldn't worry about chemical leaching, yes, there's some zinc etc but it sure beat using pt.
I have 3 of these for ornamentals, they work great. Drill some holes in the bottom for drainage. If you're away much, I'd invest in a bhyve hose end timer and some cheap drip irrigation sprayers.
I also have 25 or so various pots around our pool for tropicals and perennials. Everything on drip to be self tending. Pots are a great option for veggies but nice ones are expensive.
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