Recently I have been intrigued with the buzz around heirloom dahlias and their disease resistance. This prompted me to look further into the world of heirloom cultivars and why some are considered to have higher disease resistance.

Once I found some new friends who also shared a similar notion and intrigue around heirlooms, I ultimately decided to do a free public field study. I have no background in science but I have a thirst for knowledge and a love for flowers that has pushed me to create this study. I urge all of my fellow flower nerds to join so we can all learn together!

Dahlias that were hybridized in the year 1980 or earlier are considered heirloom cultivars. These varieties currently exceed 45 years in existence so for the purpose of this study, it's safe to say these cultivars are proper heirlooms and may have the disease resistance I'm looking to research. To check to see which of your cultivars may qualify as an heirloom for this study, please go to http://www.dahliaworld.co.uk/dahliadirectory.htm and search by the first letter of your varieties to find out!

Click the button below to read more details regarding the study and join by June 30th, 2025!