Posted: 11/05/2013 at 14:23
D. grandiflora has proved pretty perennial for me Verdun. D.laevigata as well is in it's 3rd year. D. lutea and ferruginea vary but seed around so well I can't keep a check on longevity, I suspect 2 years at the most, after which if they're not dead they look as though they should be and I remove them.
I agree about the salesman's patter. I was quite happy to let others do the Illumination Pink experiment. It wasn't hard. I like the standard foxgloves much more.