plant identity

Could anyone please tell me what this plant is called. I bought it several years ago at the Eden Project and have lost the label. I only know that it was a tropical plant. Many thanks. Richard p.s. It has the most wonderful scent.

 

Platycodon?

 

I'm not sure it is a platycodon.
Platycodon flowers don't have the long trumpet behind the flower and the leaves are different.
Platycodon flower buds also look like a balloon.

I have seen the plant you have, but I can't recall the name.

Here's one of my platycodons-

 

dipstick Richard and welcome to GC.

I feel like I should know this plant but my mind is blank with the fact it is heavily scented.

Perhaps @pete and @CarolineL can shed some light here.

 

Its nothing I have ever grown, be interested as to what it is.

 

Could it be a scented perennial phlox?

 

I came back to say Phlox divaricata or one of the creeping ones. but I wouldn't class them as tropical.

 

Phlox Blue Paradise is scented -

 

Thank you so much for all the replies. I must say that the phlox Paniculata Blue Paradise is so similar it must be the one. It was several years ago when I visited the Eden Project so I think maybe my memory isn't so good. My apologies but maybe it wasn't a tropical variety. Thankyou all for your time.

 

@dipstick, I think there are quite a few plants that look tropical but are hardy in the UK, and are useful to create a tropical look, without having to protect everything in winter.