July 23, 2026

Pink dahlia flower

A symphony of petals. Pink dahlia flower

Some flowers quietly fill a garden. Dahlias arrive as if they have been cast in the lead role. Native to Mexico, these members of the daisy family come in more than 57,000 cultivated varieties, thanks in part to their unusual genetics. Dahlias are octoploids, meaning they have eight sets of chromosomes, which helps create blooms that range from tiny buttons to 36 centimetres across.

Their history is just as colourful as their petals. The Aztecs grew dahlias for their edible tubers and medicinal uses, while their hollow stems served as natural water pipes. When dahlias reached Europe in the 18th century, they were introduced as a food crop. Gardeners soon decided the flowers were more appealing off the menu than on it.

Dahlias bloom in nearly every colour except true blue. Even the so-called black varieties are actually deep burgundy. Declared Mexico's national flower in 1963, the dahlia proves that some plants are simply born to stand out.