My Queen of Siam actually sits in partial shade with only an hour of full sun because she shares residency in the fish pond. She over winters easily at the bottom depth of 24" with small pads. This past year I also had too many things going on to take good care of her. Normally she blooms like crazy, with fertilizer, but this year no special potting, no nothing. She's also over crowded now too. She will take the back seat while I fuss with a bunch of new lilies I recently purchased.
Day 2 Photos attached.
Day 3 The Queen Rules but the Goddess is fading.