Re: are cosmos edible?

Cornucopia II lists a tropical cosmos as edible. Cosmos caudatus is native to Tropical America. In Indonesia its young leaves and tops are eaten raw and cooked. 

I can't think of any poisonous Asteraceae (formerly called Compositae).
Dahlias are edible- the petals can be used in salads and the tubers are eaten in some parts of Mexico. We decorated a wedding cake with dahlias - as you planned to do with the cosmos, just for decoration, not for eating. 

Diane Whitehead
Victoria, British Columbia, Canada
maritime zone 8, cool Mediterranean climate
mild rainy winters, mild dry summers
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