One small thing: there are quite a few species of bamboo, and not all of
them are as nasty. Some don't do a runner at all, but stay (more or less)
in their confined area.

An example would be the Fargesia Nitida: gets up to 12 ft high, but will not
inspect the rest of your garden.

Bad ones are Phyllostachis Bissetti (i.e. bamboo) or even worse the
Pseudosasa Japonica. The last one is known to produce runners that get up
to 60 ft in length (hello neighbour! :-)

The contained species are invariably more expensive than the wilder ones.

The wilder ones will smash cement pots.

I learned the hard way :-)

Theo

Hmmm...a big planter...sit it on a few layers of hard plastic covered by
mulch. Hmmm. I wonder if Bamboo would stay inside a big decorative
planter?