I essentially give one vote for each person who has contributed to the plant. So if 1 person contributes a comment, an image and has it in their list, then that still counts as one vote. Whichever plants that match my query (in this case, genus = 'Echinacea') have the most votes are then in the list (ordered by vote count, of course.)
At the moment, putting together votes I consider images, comments, and growers reports.
