Haven't grown it Valerie, aka purple tansy, and good for bees. It would make a good display in spring.
It was recommended by Peta Deacon at the Mt Coot-tha botanic garden as being nectar rich. I also read it is good green manure but that would mean cut before the bees can enjoy it :-I
Amazing that someone locally would recommend an exotic, especially a rare one. Almost anything is good for green manure - especially legumes and grasses with buckwheat being a great one allowed to seed it self-sows too.
Sorry my mistake. She said she grows them for the bees because they're nectar rich, not as green manure. The green manure bit I read elsewhere. Like I wrote, it seems irrelevant if you want the flowers.