Dahlia simple bloom variation

Asked July 11, 2020, 2:05 PM EDT

Hi, I’m wondering if you can explain to me how the dahlia blooms in this photo can come from the same plant. The single one on the top is the abnormal bloom. I am hoping for a fairly technical explanation if possible. I’m currently pursuing a PhD in neuroscience, so I’m well versed in genetics and I just don’t understand how this is possible. I’ve also come across a reference stating new dahlia varieties are obtained from cuttings if single stem variation. Do you know how common this is? Thanks for any help, Lydia

Outside United States

1 Response

Because you say that you are well-versed in genetics and are requiring a fairly technical explanation to your question, I highly recommend that you contact a university program that focuses on ornamental plant genetics--particularly the genetics of dahlias.

Here are some of the foremost American universities that focus on plant genetics in general. Staff there might be able to put you in touch with an expert on dahlia genetics:

University of Wisconsin-Madison,
Purdue University,
Michigan State University,
Cornell University,
University of Florida,

The American Dahlia Society and the National Dahlia Society (U.K) may also be able to put you in touch with an expert with university and/or laboratory experience in dahlia genetics:


Have a Great Gardening Week,