what is causing that smell?

Glad that it's flowered!
It does smell like whacky backy though!

Its hard to believe a beautifull flower like this could smell so bad sbg...What is it?

What is the smell like? It is a lovely flower.

It genuinely does smell like wacky backy (grass) Lainedru!

it smells a cross between a dog fox and cat poo in my opinion.
never smelt wacky baccky! though I was always under the impression it was a sweet/pleasant smell.
not like this.
The bulb is also smelly too. I planted mine in the autumn, a good six inches deep on a layer of grit/sand. The bulb was laid on its side too to help stop water settling in the bulb and causing it to rot.

sorry Youngdaisy dee, It is Fritillaria imperialis . Imperial fritillary to give it its common name.

I like the fowers, but the smell is awful. I know it, commonly, as Crown Imperial, Sbg, ad yes, definitely a foxy/cat poo scent, which is very unfortunate.

yes I have also heard it called that David. the smell is such a shame, but the local cats dont like it either :o)

Less cat/fox poo and more their "spray" that they mark their territory with.
I never thought that there was anything sweet or pleasant in the smell of weed, even in my misspent youth.