North American Dahlia Society

We Love Dahlias!

Welcome Message

The American Dahlia Society (ADS) was founded in 1915 and is composed of over 70 independent local societies in the US and Canada.

We are a non-profit organization founded for the purpose of stimulating interest in, disseminating information about, and promoting the culture and development of, the dahlia.

If you also love dahlias, please consider joining the ADS. You may join "at large" from this site, but for a more exciting experience, join ADS (and receive a discount) via a local society. Find a society in your area by using the ADS Societies button above or to the right. In a local society you will meet dahlia enthusiasts, learn first-hand from local growers, and have a lot of fun!

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The Dahlia Genome Project

ADS raises funds for a “low pass” genome sequence ... read more

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ADS National Show results posted

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Largest Bloom 2016 results are in...see who were the BIG winners.

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Previous Home Page Stories


  • 2016 Trial Garden results available.
  • Need help writing press releases for your local society?  Help (for members only).
  • Don't forget the 2016 Photo Contest. More info.
  • What are your tubers really thinking? Enjoy this humorous answer.
  • September 2016 Bulletin posted (for members only).
  • Provincetown Dahlia Society in the news.
  • Updated 2016->2017 Classification Change Requests posted on
    members page.
  • More new videos!  Hybridization and Virus in Dahlias.
  • New judging video available.  Members only
  • Virus testing for your garden now available.  Details  Results Update
  • List of 2016 Advancing Judges now available from members page.  Congratulations judges!

May we recommend...

Our new section on Species Dahlias.  View.