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  1. Dahlia - Wikipedia

  2. Dahlia | Description, History, & Facts | Britannica

  3. How to Grow Dahlias: The Complete Dahlia Flower Guide - The …

  4. Dahlia - Kew

  5. Dahlia Flower Types: A Guide to Groups and Classification - Gardener's Path

  6. How to Plant and Grow Dahlias - Better Homes & Gardens

  7. 65 Dahlia Varieties to Add Stunning Color to Your Garden - The …

  8. Dahlia Types Explained - National Garden Bureau

  9. Dahlia Flowers: History, Characteristics and Meaning

  10. Dahlia Types Explained - BBC Gardeners World Magazine