description Dahlia Overview
The dahlia is a genus of tuberous perennial plants native to Mexico and Central America, comprising 42 recognized species and tens of thousands of cultivated varieties. It serves as the national flower of Mexico, where the Aztecs cultivated it for food and medicine before Spanish botanists introduced it to Europe in the late 18th century. Dahlias are members of the Asteraceae family, producing composite flower heads that range from small pompons to dinner-plate-sized blooms in nearly every color except true blue. They are widely grown as ornamental garden plants and cut flowers, blooming from midsummer through autumn.
help Dahlia FAQ
Where are dahlias native to?
Dahlias are native to Mexico and Central America. Mexico recognizes the dahlia as its national flower.
Do dahlias grow from bulbs?
Dahlias grow from underground tubers, not true bulbs. Gardeners usually lift and store the tubers in cold climates because many cultivated dahlias do not survive hard frost.
How many dahlia species are recognized?
The genus contains 42 recognized species and tens of thousands of cultivated varieties. Garden dahlias vary widely in flower form, height, color, and bloom size.
Were dahlias used before modern ornamental gardening?
Yes. The Aztecs cultivated dahlias and used them for food and medicine before Spanish contact. Modern horticulture later developed the plant into a major ornamental flower.
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