Tradiscantia

I don't grow it. It always looks a bit untidy to me, much as I just love the colours. This, coming from a person with more weeds than plants. It should like the same conditions as the beautiful Aquilegia next door.

I have several in this garden and have always had them and loved them.
Even though all literature seems to day they'll thrive in any condition, site etc. i've found them to do a lot better in full sun and well drained.

I grew them until last year Merlin, but like Cherry, I found they were untidy, the leaves flopped even when staked. I had them on a dry slope and they flowered OK. I dug them up and potted them and they are in the cold frame, flowering well and the leaves have not flopped! I think this is because they have been watered regularly and didn't like the previous dry conditions. The leaves on my blue ones are green, not yellow. They are going on the Garden Club plant stall at the Street Market in a couple of weeks' time ;D

I grow Tradescantias too - no problems. I have two in the back garden - 'Concord Grape' and 'Sweet Kate' and a new-ish white one in the island bed that was sent to me. They're fine - and yes, I find they do better in the sun.

I love Perovskia. I'm guilty of not being nasty enough to it when I prune it.

Why don't you think it will Merlin ?
I lost some things in those flower beds where they are but they themselves came through so it might surprise you.

That's a beauty, it would look good alongside the blue one.