I'd also appreciate any suggestions on
wildflowers as nectar and pollen sources.
Roger,
The best book that I have used in this connection is E.B. Wedmore's "A
Manual of Beekeeping" ISBN 0 905652 01 0 which gives internationally-useful
lists of nectar and pollen plants. This is an old-fashioned but very
valuable book - in print for 66 years!
Regards, Bernie Duggan, Denbury, Devon, UK.