Could be Hostafan. The leaves don't look like erysimum to me either, though it's that family. I've never had a H. matronalis quite as floriferous as that.
I've enlarged the photo - it's definitely Hesperis matronalis - foliage, flowers and immature seed pods are identical to mine except mine is the white form. Mine is on a shady north facing bank. If the purple one gets plenty of sunlight that will explain why it's doing so well. This appears to be a very good year for Sweet Rocket
Last edited: 22 June 2016 19:31:45
“I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh
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Perennial wallflower?
erysimum bowles' mauve
Erysimum Bowles Mauve. And what a fabulous specimen it is.
it looks like hesperis matronalis, sweet rocket. The leaves looks wrong for Erysimum.
I might well be wrong.
Is it scented Kevan?
Could be Hostafan. The leaves don't look like erysimum to me either, though it's that family. I've never had a H. matronalis quite as floriferous as that.
I vote hesperis matronalis.
A close up of foliage and flowers would help (I keep failing with my idents!).
I've enlarged the photo - it's definitely Hesperis matronalis - foliage, flowers and immature seed pods are identical to mine except mine is the white form.
Mine is on a shady north facing bank. If the purple one gets plenty of sunlight that will explain why it's doing so well. This appears to be a very good year for Sweet Rocket 
Last edited: 22 June 2016 19:31:45
Delightful Dove. I could do with some of that here