I grew these last year & they flowered this year & have now died so I presume that makes them biennial :ah I've heard they may be perennial. Over 5ft tall (I'm 5ft' 2ish & they were taller), they have large leaves thru the first year & I found them very impressive, in the second year they had long flower spikes with mauve/blue & white flowers, on google the pic most like them is the first one that comes up (will it be the same for all?) a german site i think. anyway i thought i'd offer them now instead of waiting for the swop as some people may like to sow now as biennials.