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Are dahlias annual or perennials?

Updated February 21, 2017

Dahlias can be either annuals or perennials. According to the University of Nebraska-Lincoln Cooperative Extension, dahlias that flower the first year from seed are annuals, while you usually grow perennial dahlias from tuberous roots.

About Dahlias

Dahlias are members of the sunflower family of plants (Asteraceae). Dahlias include at least 27 species and thousands of cultivars (cultivated varieties) developed through hybridisation, according to the Union County College Biology Department. The flowers come in almost every colour, and size of the flowers range from tiny to 12 inches across.

Types of Dahlias

Single-flowering dahlias have one row of petals, usually grow to a height of no more than 3 feet and have flowers that are 4 inches or less in diameter. Examples of single-flowering dahlias include orchid-flowering, anemone and collarettes. Double-flowering dahlias have multiple rows of petals, grow taller and have larger flowers.

Growing Dahlias

You can grow dahlias from seed, from tuberous roots or from cuttings. Dahlias are hybrid flowers, which means that plants grown from seeds are not consistent. Dahlias prefer full sun and well-drained soil.

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About the Author

Carol Wiley started writing as a technical writer/editor in 1990, was a licensed massage therapist for almost 12 years and has been writing Web content since 2003. She has a Bachelor of Science in aerospace engineering, a Master of Business Administration, a Certificate in Technical Writing and Editing and a Certificate in Massage Therapy.