In Holland they use bee-hive bild from Red Cedar.
The bees does not have problems with it.
 
Kind regards.
 
Jan Kruit
The Netherlands
 
Hally L Phillips wrote:
 
> Can you tell me if Cedar can be used for building Mason bee nests?
> Everything that I have read says that you can use Pine or Douglas Fir, or
> even treated lumber. But nothing I have read says anything about using
> Cedar. I wonder if Cedar is to aromatic for the bees?  Any help would be
> appreciated.
>
>  Thank you, David Phillips           Lakewood, WA.