I have the 2-3' tall solomon's seal. From my latest blog post:
"So far our asparagus is a very poorly yielding crop in terms of calories per space it takes up--only 280 calories from maybe 10 plants using maybe 30 square feet? Our solomon's seal gave 2/3 the calories from a similar area but growing in heavy shade on the north wall of our house, under timber bamboo, with lungwort, lovage, and wood sorrel in there as well. And we didn't even harvest as much of the solomon's seal as we could have."
Tastes as good as asparagus to me. Highly recommended.
It's normal for it to die down in the winter; not sure if there are other signs of death concerning you, Charles.
Norris
Portland, OR
http://farmerscrub.blogspot.com