Large pots/planters (South Woodford E18)

I live in a block of apartments where most of the residents are elderly. I would love to get some big pots and put them into the outside communal space and get the residents involved with growing plants/veg in pots. Anyone know where I can find large plant pots and planters please? I live in a block of flats where a number of my neighbours are elderly. I’d love to get some pots and planters in the communal area and get all involved in the activity. Thanks in advance! Pics of course are just for illustration ❤️ Any plastic/ceramic big pots/planters, wooden/metal planters, etc 😎 would be super.