So I'm giving a talk to a gardening club in a couple of weeks. In addition to my "standard" (can one delivery count it as standard yet) talk on honeybees, they want to know what they can do from a gardening point of view.

I must admit that at this point I was kind of intending to head off into bumble/solitary bee territory and a bit of a mention about spraying stuff but could do with a bit of help about what sort of common garden plants are attractive to bees. What little knowledge I have is more applicable to allotments.

But if you were littering around the garden centre planning your garden and wanted flowers that were attractive to bees what would look for?

(haven't forgotten the article in beecraft, just gathering more opinions)