It is probably worth a try. We have several cultivars blooming under a big white oak and you would think they were in full sun. The main problem is that the scapes tend to lean toward the light. The darker colors will not show up as well as some bright colors.

ok, yea I heard about getting darker colors if you were going to have more shade than normal which is why I was thinking of purple. is that wrong?

I can't speak to the sun question other than to say that no place on my property has sun all day (several trees, in my yard and on adjoining properties) but my DLs do pretty well on the whole. Factors other than sun seem to play a larger role.

I can say this, though - if you want plants that bloom consistently during a certain time period, DO VERY THOROUGH RESEARCH! I have purchased DLs from local garden centers that were blooming in late July, assuming they would bloom into August, only to find that, in my garden, they bloomed much earlier. Just last year I bought an El Desperado from Oakes Daylilies, which is located in Tennessee (I am north of them, in Virginia near DC), and it bloomed several weeks before the two I have had in the ground for several years. Hopefully in the future it will adjust to the cooler climate and bloom with the others.

Last year I found a grower in north western Virginia (roughly my latitude) and I bought several plants from them that were blooming in mid July, but still had lots of buds. With one exception (which I bought for its color) they are all doing pretty much as expected, being among my late bloomers, which was my goal.