Kim, this will be interesting to see what you get in the way of replies. I don't even bother keeping records on evergreen foliage in my garden except for when I'm registering a daylily. Every hybridizer does register their daylily foliage class. The trick is that a hybridizer in the south may see evergreen foliage but it may not be evergreen in the northern zones, and vice versa for a hybridizer living in the north recording the foliage behaviors in his garden. What he might register as dormant would truly be evergreen in your garden.

You can check the American Hemerocallis Society database using the Advanced Search and specifying height, foliage type and rebloom, what you are interested in finding. But I would think that the most reliable recommendations would come from your local daylily club and local growers of daylilies. The AHS and local clubs are a great and underused resource.

And you just may want to check out the topic on the Maryott Garden daylilies on this forum. He's one of California's growers and could well advise you. His plants are terrific, too.

Kim, do you have a preference for bloom type? The Spider Type or unusual form like North Wind Dancer:

or the round "bagel" type like Ruby Lipstick?

kay

I would recommend my RAY SOUTHWORTH. It is a big flower, repeats well and has very persistent, dark green foliage year round. You can obtain it from Paynes In The Grass Daylily Farm in Pearland, Texas. It is pictured in the AHS Daylily Database.
Ed

I honestly believe a spider type would suffice if there were MANY of them, fairly continuously and the foliage was durable and persistent. The bagel type would definitely fit the landscape style better and possibly provide more of a "pop" of color.

The house is a light gray with white trim, modern looking remodel of an older home. Most of the landscaping is "green" in varying shades and textures. The ground cover roses are all pale pink (read white in our sun!). Literally any color would work, she stated she has no preference as long as there IS color as long and as frequently as possible. I've known her for years and am confident she would accept pretty much any flower form as long as there are LOTS of them, for as long as possible.

The suggestions so far are beautiful! Thank you. Now, finding eleven plants of the right one is the hunt...Kim

Now, finding eleven plants of the right one is the hunt...

True, but in that zone, a pair of double fans can easily yield twice (or more) that amount in one season.

I would recommend American Splendor and almost
any of the Spacecoast cultivars that have large enough
blooms. SPC Pumpkin Power comes to mind.