In article
,
Billy wrote:

That was a jolly romp. No definitive answer here I'm afraid, unless the
absence of proof is a vindication.

Wild daffodils (Narcissus pseudonarcissus - L.) are said to contain more
lycorine than domesticated daffodils.

Narcissus pseudonarcissus - L. is a medical herB
used as an astringent, and an emetic.
http://www.pfaf.org/database/plants.php?Narcissus+pseudonarcissus

I found no reference to soil contamination from daffodils, nor
assimilation by other plants.

Toxicity in plants isn't unusual
http://www.anapsid.org/resources/plants-ag.html
http://highered.mcgraw-hill.com/site...58186/goldfran
k_toxicology_chap114.pdf
but the toxicity doesn't seem to be transferable to other plants, or
unless it is consumed.

I wouldn't worry about composting the remains of your daffodils, or
using their bed for use in food crops.
--
- Billy
"Fascism should more properly be called corporatism because it is the
merger of state and corporate power." - Benito Mussolini.
http://www.youtube.com/watch?v=Arn3lF5XSUg
http://www.thirdworldtraveler.com/Zinn/HZinn_page.html