Nice order there, I really like Tough Cookie and I now I recall being interested in their primroses- thanks for the reminder!
When I first moved here there were bearded irises crowded all along the side of the house, shaded by a spruce tree and a sycamore. The spruce had to go, it shaded the whole side of the house and cut off visibility from the windows. The area was then in partial shade of a deciduous tree that became pretty dense shade by mid summer and the irises started blooming. Then I started thinning them out and other colors started showing up the next year. The most plentiful noid of them blooms profusely in spite of the shade, which is why I have left a bunch there.
I believe some varieties are more tolerant of shade than others, unfortunately there doesn't seem to be much info available on shade tolerance of specific varieties.
Ooohh...perhaps this is a quality you can breed for?
