Weed or perrenial please?

Wonder if you could help,hopefully you can tell me through the photo if this staggering plant is a weed or perrenial,being a casual gardener ive put a few perrinials in a small patch of soil over the last few years,some have come back some not but this thing stands waaaay taller than the rest at about 7 feet,it has pretty purple flowers but its just huge,ive had a lot of weeds this year and cant even remember planting this one,it has super thick stems and too,if it is a weed its a pretty one,ive now cut it back as the wind bent it right over nearly 90 degrees,any help please??thank yoooo

 

Not a good photo to work from but my best guess is Erysimum.

 

Looks more like phlox to me.