We help you grow!

Take advantage of all the American Daylily Society has to offer. From our online daylily registration process to free digital presentations, source lists and great publications, we strive to provide many resources to enable our members, hybridizers and daylily fans to grow. Many of our resources are available to non-members to support our mission of helping the world grow great daylilies.

Register a Daylily

AHS Hemerocallis Hybridizer/Registrant List - 1893 to Present

The AHS Hemerocallis Hybridizer/Registrant List hereafter referred to as “the List” is an accumulation of the data found in all daylily checklists dating from the first checklist of Hemerocallis published in 1949, the DCH (Descriptive Catalog of Hemerocallis Clones – 1893 to 1948) to the present.

This List is a spreadsheet that relates all hybridizer abbreviation codes to specific hybridizers and that reflects the geographic region code associated with the address used for daylily registrations. It is normally updated after each annual checklist supplement has been produced and is also annotated with hybridizer dates of death, if known. See the Explanation Sheet for further details.

Hybridizer List – Sorted by Abbreviated Name

Hybridizer List – Sorted by Region

Explanation Sheet

capturing history

Registering a Daylily

The American Daylily Society is honored to be the official Registrar for the genus. Daylily Registration is the process of documenting the details about a specific cultivar. It is done by the Registrar under the guidelines developed and promulgated by the International Union of Biological Sciences, International Commission for the Nomenclature of Cultivated Plants as published by the International Society for Horticultural Science as the International Code of Nomenclature for Cultivated Plants, often referred to as the ICNCP or Cultivated Plant Code. These guidelines are set forth as horticultural regulations detailing the rules by which a plant can be registered. The Registrar does not have the right to waiver from these rules. Use the arrows below to flip through topics on daylily registration, or continue to the electronic registration process.


Daylily Registration

How to Register a Daylily

If you're looking to register your first daylily hybrid, or if you haven't done it for a while, check out this simple instructional guide.

Registration Instructions (PDF)


Important Questions and Answers

You can save yourself and the Registrar time and frustration if you read through these questions and answers on the registration process. The first question you should ask before starting the registration process is, "does my proposed name already exist as a registered daylily?" You can answer that quickly by using the search tool in our daylily database.


Daylily Registration

Registration Rules

The Daylily Society is required to follow naming and registration rules that are a part of the ICNCP (International Code of Nomenclature for Cultivated Plants). As such, we ask that you review the rules before submitting your daylilies for registration.

View Registration Rules (PDF)

Daylily Registration

Frequently Used Terms and Abbreviations

Descriptive terms and abbreviations used when registering daylilies are explained here. This is a living list, and if you have suggestions, please submit them to

See Terms and Abbreviations

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Articles and Resources from the Archives

Members enjoy access to an expanded collection of articles and resources from the archives.  This sample below is some of our favorite articles from the past, including reflections on the society’s 70 year history.  Use the JOIN US link at the top of this page to enjoy the full range of benefits!

American Daylily Society Reflections:

  • Reflections on 50 Years Ago. Click here(Updated 2011) 
  • Reflections on 25 Years Ago. Click here(Updated 2009)

Samples from the members-only collection:

  • Three Articles on Daylily Seed Topics by Dr. Robert H. Griesbach. Click here.
  • The Art of Hybridizing (seven part series) by Oscie Whatley. Click here.
  • Hybridizing With Converted Tetraploids (4 part series) by Oscie Whatley. Click here

The AHS Archives Fund exists to help meet the costs of the acquisition and care of historical materials relevant to Hemerocallis, and to the American Daylily Society and its people and events. Such materials may include books, newspaper and magazine articles, records of the business of the Society itself, theses and dissertations, photographic or digital documents or collections of enduring value, or other pertinent items associated with daylilies or the society. Significantly, the fund allows for the purchase of specialized software and equipment needed, but not covered in the annual budget of the Archives and History Committee.  If you wish to contribute to this fund, please click this link and specify the Archives Fund.

The American Daylily Society