Hello All,
Taken from the book "American Honey Plants" by Frank C. Pellett. pg.336:

The great ragweed (Ambrosia trifida) is often called horseweed. This is a
very common weed , growing to a height of 10 or 12 feet in North America.

The ragweed does not produce nectar, but furnishes LARGE QUANTITIES OF
POLLEN IN *late summer* and fall.

Bob harrison:
Late summer and fall eliminates most midwest clover honey extracted before
Spetember as containing very much ragweed pollen. IN MY OPINION  if the
allergy is mainly from ragweed you need unprocessed honey with suspended
ragweed pollen in order to help the body adjust to ragweed.
 Every allergy sufferer is different but those which suffer *cold like
symptoms* during ragweed season *usually*  find relief FROM MY EXPERIENCE if
they take a teaspoon (or tablespoon) a day of unprocessed local honey (with
suspended ragweed pollen) 30 days prior to the start of ragweed season.

In my opinion the body adjusts to the ragweed slowly and does not produce a
huge amount of histamines when the ragweed season starts.

Hope this posts helps a allergy sufferer!

Sincerely,
Bob Harrison