
Dahlia variabilis, belongs to the Asteraceae family. Other well known members of this family include Lettuce, Sunflower, Gerbera, Marigold, Calendula, Zinnia and Chrysanthemum. Native to Mexico, Central America and Colombia, the Dahlia was introduced to Europe in the late 18th Century. It is a plant that is particularly well documented and much information is available regarding its earliest cultivations.
Dahlia seedlings are available in the summer months in the garden centres, ready to be planted straight into your garden. These seed raised bedding varieties are treated as annuals in the frost regions of South Africa.
Dahlias are herbaceous and bushy. Their height can vary from 30cm to well over 200cm. The compact bedding varieties generally mature at a height of 30-40cm. The stems are thick and the leaves medium sized. Generally ovate in shape and serrated at the edges. Leaf colour can vary from a shiny dark green to a dull lighter green.

The available colours and variations are too numerous to mention. It will suffice to say that all colours are possible except true blue.
Dahlias should be planted in a sunny location (minimum six hours of sun) that is protected from wind. They like fertile, well draining soil. Before planting, prepare the soil by adding compost or well aged manure. Despite Dahlias requiring regular watering, it is very important that their roots do not sit in water logged soil.

Dahlias are a firm favourite with slugs and snails. They are also prone to mildew type diseases. As a result it is important to allow enough space for air movement between each plant.
If planting seed varieties, they will produce tubers. If you live in a frost free zone, these tubers can be left in the ground and they will begin flowering again the following season. In frost zones, you can dig up the tubers and store them for replanting the following year.
Happy gardening!
Did you know: The Dahlia was declared the national flower of Mexico in 1963?
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