21/08/2022
THERE IS NO SUCH THING AS BLACK ROSE OR BLUE ROSE
Sorry to disappoint, but there is no such thing as ‘black’ roses. What might sometimes be referred to as a black rose is actually a dark red rose. A good example is “The Black Rose of Turkey”, is a breed that appears pitch-black to the eye, but in actuality it is a dark reddish-crimson colour.
True-blue pigments don’t occur naturally in Roses. There are lots of good purples among the old roses and hundreds of excellent mauves and lilacs were introduced in the 1950s and 1960s (think of Sterling Silver, Lavender Dream and Lilac Charm) as the unexpected result of breeding for vigour. Rhapsody in Blue, a vigorous shrub with smoky-purple flowers, is one of the most popular of modern roses, but it’s not the sort of blue we’re looking for.
The truth is that the only way to get clear blues into our roses is by doing a bit of genetic modification in the lab. This is something that many people disapprove of, conveniently forgetting that the History of all plant-breeding is basically a history of genetic improvement. In 2004, researchers used genetic modification to create roses that contain the blue pigment delphinidin, but such roses still are better described as mauves and lilacs not blue.