Shrubs for large pots

We have a callistemon in a large tub - I love it, it reminds me of Australia.

?well, you must all have very green fingers, as I was taking info from a gardening site.Of course it all depends where you are as well, maybe milder and more sheltered than my garden.
Having looked at all the possibilities and wanting failsafe hardy plants that can withstand almost anything have decided on Euonymus Bravo.Have sourced some medium sized specimens as the pots are quite large, so just need to order them now.

We did wrap the callistemon up in a nice fleece coat and hope it survives the very cold weather.

I wrap myself in a nice warm fleece coat in Winter too.?

It’s a NZ shrub I think Jalima ?

Is it? I didn't know.
There are lots of them in Australia, where they grow into trees, also on one of the islands we visited in the South Pacific. I haven't been to New Zealand.

Hebes should do well provided you don't go for a really fancy, fussy one. The bloomin' things self seed in our garden and we've one growing in the front garden against the side paling fence where we have to park the car. Can't dig the thing out. It's exposed, in full sun, on builders rubble and subsoil, with paving one side and next door's concrete drive the other. Flowers wonderfully every year despite (or because of) my hacking it back.

That sounds a good one NFK any way of finding which one it is? We have lost so many hebes over the years.
The worst Winter here was about -13 but we lost plants that should have been ok to -15.