..... The plants completely filled the 1 gallon pots ..... I spent several weeks hulling the plants in and out of a cold chamber and ultimately saw no difference between the control and treatments.
What a wonderful reminiscence spujr - I can most vividly in my minds eye imagine you "schlepping" those heavy pots, back and forth, and forth and back....and to no avail!
I'm sure, that the outcome of your study was perfectly valid - and, actually, was what I would have expected! Rudolf (GuRu) is of course right in proposing, that a marked drop in temperature is needed iin the culture of one of the parents, namely insigne, to enhance flowering (except for polyploids of this species, that flowers unashamedly at room temperature!). The other parent, spicerianum, though, has a vast habitat, and can be grown and flowered under hot to cooler conditions. When taking this into consideration and accounting for hybrid vigour and the adaptability of many a hybrid, the result - the lack of differences between control and treatments - may not come as a startling chock. Except, maybe, for the poor student/researcher, who expected another outcome - and Rudolf, of course!
(PS. Your study, by the way, is a fine, demonstration example of Popper's falsification theory!

)