I had recently read an article that the possibility of having natural blue rose is extremely rare because of the absence of delphinidin in most roses. Are all blue roses just a product of cross-breeding?

  • $\begingroup$ Wikipedia article on blue roses has a pretty comprehensive explanation. $\endgroup$ Aug 27, 2013 at 2:17

1 Answer 1


There are no roses (that is, flowers of genus Rosa species) that naturally express a "true" blue color. Through cross-breeding, there are lilac-mauve rose horticultural varieties ("Blue Nile","Blue Moon","Lady X", etc.), and through genetic engineering (actually inserting delphinidin-producing genes) there are mauve-lavender varieties ("Applause"). The insertion of delphinidin-producing genes did not yield blue colour roses as hoped is due to the acidity of the rose petals, which itself changed the delphinidin blue to mauve-lavender instead. The next breakthrough will be to switch off the acidity of the rose petals to create a true blue rose.

More info

Wikipedia article Blue Rose gives good coverage.

Here's a nice scientific bibliography of rose pigments with some good information on blues.


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .