In the first image, flowering occurs in the stage labeled "Pollination", which is when the male releases pollen and the female accepts pollen. It give the time as 56-63 days after emergence, but note the asterisk ("*"); the footnote for it says their given times vary by "growth class" (such as "early" or "late"), indicating that these numbers are just a guide and actual times will vary by the cultivar (breeding strain) selected.