All registered daylilies are in the database except for maybe a very few of the newest 2023 intros and those get added throughout the year as they appear on the ADS site.
If you can't find something, check spelling or even search with only part if the name. like 'daylily Yum'.
To add a plant, all you need is:
Genus: (Hemerocallis in this case)
Cultivar: name of plant
And an online link as proof it exists.
