Aconitum sp. tall, dark and handsome (monkshood)
I think this might be Aconitum napellus (as per the one in the photograph) but I'm not entirely sure. It was sent to me as tall and dark blue, and the foliage looks very similar. It is a remarkably strong grower anyway, and doesn't seem to have the same "caviar for gastropod" tendencies as many of the Delphinium family. I'm looking forward to flowering some in my garden this year, and in the meantime there's plenty available to share with you. (please note that this plant is highly poisonous if ingested, so don't eat it!).