Oleander Honey is Poisonous

In Theory, Even Honey Made From Oleanders' Nectar is Poisonous
The Arizona Republic (USA), 8/30/2008

If bees make honey with nectar from oleander flowers, is the honey poisonous?

Yes. Oleanders are pretty much all-around poisonous from the roots to the leaves to the sap in the branches.

Among other things, they contain oleandrin, which can paralyze the heart.

The bees themselves are not affected by the oleanders' toxins, but at least, in theory, the honey from oleanders would be poisonous.

On the upside I couldn't find any records of anyone dying from such honey…