New to growing begonias outdoors, but know Rex, Wax and Reiger begonias very well as a houseplants.

I bought one dozen of tubers of Non-stop Begonias and started them indoors, everything is OK by now.

Just wondering: where to put them outdoors when the danger of frost passes? I would prefer to keep them in containers.

I have totally flat small city backyard with some shrubs and spring bulbs. How begonias are usually ised in landcape: along the path, each in own pot and pots grouped together, or one big (how big?) container to look like a bed of annuals, anything else?

I could imagine pots on a nice metal plant supports, but they are too expensive.

Also, what size of the pot is common for growing non-stop begonias, 8-10 inches (25 cm diameter) for each plant?

Thanks.